JavaScript表单验证没有按预期工作,即使有错误也提交表单

时间:2017-10-01 07:56:49

标签: javascript php jquery html forms

我最近开始学习JavaScript和PHP。在我的代码中,我想以管理员身份向系统添加项目。到目前为止,我已经完成了验证。这个验证不是那么严格,但它提交的表单没有显示空字段或填写错误的字段。由于我是初学者,我无法发现错误,但代码工作正常。有任何建议可以避免这些错误并正确进行验证吗?

getImageUri(Bitmap inImage){
  String path =  MediaStore.Images.Media.insertImage(getApplicationContext.getContentResolver(), inImage, "Title", ""); 

  return path;
}
function validateForm() {
  var item = document.add.item.value;
  var type = document.add.type.value;
  var category = document.add.category.value;
  var title = document.add.title.value;
  var publisher = document.add.publisher.value;
  var year = document.add.year.value;
  var place = document.add.place.value;
  var Abstract = document.add.Abstract.value;
  var medium = document.add.medium.value;
  var edition = document.add.edition.value;
  var number = document.add.number.value;
  var shelf = document.add.shelf.value;
  var call = document.add.call.value;
  var barcode = document.add.barcode.value;
  var pages = document.add.pages.value;
  var Barcode = barcode.length;
	
  if (item == "" || type == "" || category == "" || title == "" || publisher == "" || year == "" || place == "" || Abstract == "" || medium == "" || edition == "" || number == "" || shelf == "" || call == "" || barcode == "" || pages == "") {
    alert("Please fill all details");
    return false;
  }
		
  if ((Barcode >= 17) || (Barcode < 12)) {
	alert("Password should have 12 - 16 characters");
    return false;
  }
		 	  		
  if (isNaN(barcode)) {
    alert("Incorrect Bar Code Number");
	return false;
  }
}
body {
  background-color: #9cb4c0;
  background-size: 100% 100%;
}
	
.div-1 {
  float: right;
  padding: 20px 10px;
}
	
h2 {	
  text-align: right;
}
	
a:link {
  color: rgb(7, 19, 86);
  background-color: transparent;
  text-decoration: none;
  font-size: 20px;
}

a:visited {
  color: orange;
  background-color: transparent;
  text-decoration: none;
}
	
a:active {
  color: rgb(216, 120, 10);
  background-color: transparent;
  text-decoration: underline;
}

.list-1 {
  list-style-type: none;
  overflow: hidden;
  margin: 0;
  padding: 0;
  text-align : right;
}

.list-1:active {
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
.list-1 li  a {
  float: right;
  display: block;
  padding: 8px;
  text-align: center;
  border: 1px solid #e7e7e7;
  background-color: #f3f3f3;
  color: #666;
}
	
.list-1 li a:hover {
  background-color: #ff6c00;
}
	
.list-2 {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #228bbb;
}
	
.list-2 a {
  border-right: 1px solid #bbb;
  float: left;
  display: block;
  padding: 14px 16px;		
  color: rgb(7, 19, 86);
}
	
.list-2 a:hover:not(.active) {
  background-color: #ff6c00;
}
	
.list-2 .active {
  background-color: #ff6c00;
}

.button-1, .button-2 {
  background-color: #2980B9;
  color: white;
  font-family: arial;
  border: none;
  padding: 10px 10px;
  text-align: center;
  display: inline-block;
  margin: 4px 8px;
  -webkit-transition-duration: 0.4s;
  transition-duration: 0.4s;
  cursor: pointer;
  font-style: italic;
  outline: none;
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

.button-1:active, .button-2:active {
  background-color: #2980B9;
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
footer {
  clear: both;
  position: relative;
  z-index: 10;
  height: 1em;
  text-align: center;
  background-color: #228bbb;
  color: black;
}

4 个答案:

答案 0 :(得分:2)

只需替换此

    var item=document.getElementById("item").value;
    var type=document.getElementById("type").value;
    var category=document.getElementById("category").value;
    var title=document.getElementById("title").value;
    var publisher=document.getElementById("publisher").value;
    var year=document.getElementById("year").value;
    var place=document.getElementById("place").value;
    var Abstract=document.getElementById("Abstract").value;
    var medium=document.getElementById("medium").value;
    var edition=document.getElementById("edition").value;
    var number=document.getElementById("number").value;
    var shelf=document.getElementById("shelf").value;
    var call=document.getElementById("call").value;
    var barcode=document.getElementById("barcode").value;
    var pages=document.getElementById("pages").value;
    var Barcode = barcode.length;

&#13;
&#13;
function validateForm() {
  	var item=document.getElementById("item").value;
	var type=document.getElementById("type").value;
	var category=document.getElementById("category").value;
	var title=document.getElementById("title").value;
	var publisher=document.getElementById("publisher").value;
	var year=document.getElementById("year").value;
	var place=document.getElementById("place").value;
	var Abstract=document.getElementById("Abstract").value;
	var medium=document.getElementById("medium").value;
	var edition=document.getElementById("edition").value;
	var number=document.getElementById("number").value;
	var shelf=document.getElementById("shelf").value;
	var call=document.getElementById("call").value;
	var barcode=document.getElementById("barcode").value;
	var pages=document.getElementById("pages").value;
	var Barcode = barcode.length;
	
  if (item == "" || type == "" || category == "" || title == "" || publisher == "" || year == "" || place == "" || Abstract == "" || medium == "" || edition == "" || number == "" || shelf == "" || call == "" || barcode == "" || pages == "") {
    alert("Please fill all details");
    return false;
  }
		
  if ((Barcode >= 17) || (Barcode < 12)) {
	alert("Password should have 12 - 16 characters");
    return false;
  }
		 	  		
  if (isNaN(barcode)) {
    alert("Incorrect Bar Code Number");
	return false;
  }
}
&#13;
body {
  background-color: #9cb4c0;
  background-size: 100% 100%;
}
	
.div-1 {
  float: right;
  padding: 20px 10px;
}
	
h2 {	
  text-align: right;
}
	
a:link {
  color: rgb(7, 19, 86);
  background-color: transparent;
  text-decoration: none;
  font-size: 20px;
}

a:visited {
  color: orange;
  background-color: transparent;
  text-decoration: none;
}
	
a:active {
  color: rgb(216, 120, 10);
  background-color: transparent;
  text-decoration: underline;
}

.list-1 {
  list-style-type: none;
  overflow: hidden;
  margin: 0;
  padding: 0;
  text-align : right;
}

.list-1:active {
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
.list-1 li  a {
  float: right;
  display: block;
  padding: 8px;
  text-align: center;
  border: 1px solid #e7e7e7;
  background-color: #f3f3f3;
  color: #666;
}
	
.list-1 li a:hover {
  background-color: #ff6c00;
}
	
.list-2 {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #228bbb;
}
	
.list-2 a {
  border-right: 1px solid #bbb;
  float: left;
  display: block;
  padding: 14px 16px;		
  color: rgb(7, 19, 86);
}
	
.list-2 a:hover:not(.active) {
  background-color: #ff6c00;
}
	
.list-2 .active {
  background-color: #ff6c00;
}

.button-1, .button-2 {
  background-color: #2980B9;
  color: white;
  font-family: arial;
  border: none;
  padding: 10px 10px;
  text-align: center;
  display: inline-block;
  margin: 4px 8px;
  -webkit-transition-duration: 0.4s;
  transition-duration: 0.4s;
  cursor: pointer;
  font-style: italic;
  outline: none;
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

.button-1:active, .button-2:active {
  background-color: #2980B9;
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
footer {
  clear: both;
  position: relative;
  z-index: 10;
  height: 1em;
  text-align: center;
  background-color: #228bbb;
  color: black;
}
&#13;
<!DOCTYPE HTML>
<html>
  <head>
    <title> SLIIT LIBRARY </title>
    <link rel = "stylesheet" type = "text/css" href = "Style.css"/>
    <script src = "//cdn.jsdelivr.net/webshim/1.14.5/polyfiller.js"></script>

    

    <script type = "text/javascript" src = "http://code.jquery.com/jquery-2.1.4.min.js"></script>
 
    <script type = "text/JavaScript" src = "FormValidation.js"></script>

  </head>
  <body>

    <img src = "SLIIT.png" width = "300" height = "200" />
    <div class = "div-1">
      <ul class = "list-1">
	    <li>
          <a href = "Register to the system.html" target = "_blank"> Register </a>
        </li>
	    <li>
          <a href = "Login to the system.html" target = "_blank"> Staff </a> 
        </li>
      </ul>

      <h2> 
        <a href = "/SLIIT LIBRARY/" target = "_blank"> SLIIT LIBRARY</a>
      </h2>
    </div>

    <ul class = "list-2">
      <li> <a href = "/Home/" target = "_blank"> Home </a> </li>
      <li> <a href = "/Add Material/" target = "_blank"> Add Material </a> </li>
      <li> <a href = "/Search/" target = "_blank"> Search </a> </li> 
      <li> <a href = "/Borrowed Books/" target = "_blank"> Borrowed Books </a> </li>
      <li> <a href = "/Member Details/" target = "_blank"> Member Details </a> </li>
  </ul>

  <center>
    <h3>Adding New Material</h3>
    <form id = "add" name = "SLIIT Library" method = "POST" action = "" onsubmit = "return validateForm()">
      <table>
	    <tr>
		  <td>Item Number</td>
		  <td><input type = "text" name = "Item Number" id = "item" placeholder = "B001"></td>
	    </tr>
		
	    <tr>
		  <td>Item Type</td>
		  <td>
            <select name = "Item Type" id = "type">
		      <option>---Select One---</option>
			  <option>Book</option>
			  <option>Standard</option>
			  <option>Journal</option>
			  <option>CD</option>
			  <option>Article</option>
            </select>
		  </td>
	    </tr>
	
    	<tr>
		  <td>Category	</td>
		  <td>
            <select name = "Category" id = "category">
			  <option>---Select One---</option>
			  <option>Information Technology</option>
			  <option>Business Management</option>
			  <option>Enginerring</option>
			  <option>General</option>
            </select>
		  </td>
	    </tr>
	
	    <tr>
		  <td>Title	</td>
		  <td><input type = "text" name = "Title" id = "title" placeholder = "JavaScript and PHP"></td>
	    </tr>
		
	    <tr>
		  <td>Publisher	</td>
		  <td><input type = "text" name = "Publisher" id = "publisher" placeholder = "JavaScript and PHP"></td>
	    </tr>
	
	    <tr>
		  <td>Year of Publication	</td>
		  <td><input type = "date" name = "Year of Publication" id = "year"></td>
	    </tr>
	
	    <tr>
		  <td>Place of Publisher</td>
	      <td><input type = "text" name = "Place of Publisher" id = "place" placeholder = "England"></td>
	    </tr>
	
	    <tr>
		  <td>Abstract	</td>
		  <td><textarea name = "Abstract" id = "Abstract" rows = "3" cols = "18"></textarea>
	    </tr>
	
	    <tr>
		  <td>Medium	</td>
		  <td>
            <select name = "Medium" id = "medium">
			  <option>---Select One---</option>
			  <option>English</option>
			  <option>Sinhala</option>
			  <option>Tamil</option>
            </select>
		  </td>
	    </tr>
	
	    <tr>
		  <td>Edition	</td>
		  <td><select name = "Edition" id = "edition"/>
			<option>---Select One---</option>
		  </td>
	    </tr>
	
	    <tr>
		  <td>ISBN/ISSN No	</td>
		  <td><input type = "text" name = "ISBN/ISSN No" id = "number"></td>
	    </tr>
	
	    <tr>
		  <td>Shelf Number	</td>
		  <td><input type = "number" name = "Shelf Number" id = "shelf" min = "1"></td>
	    </tr>
	
	    <tr>
		  <td>Call Number	</td>
		  <td><input type = "number" name = "Call Number" id = "call" min = "1"></td>
	    </tr>
	
	    <tr>
		  <td>Bar Code No	</td>
		  <td><input type = "number" name = "Bar Code No" id = "barcode" min = "0"></td>
	    </tr>
	
	    <tr>
		  <td>No of Pages </td>
		  <td><input type = "number" name = "No of Pages" id = "pages" min = "1"></td>
	    </tr>

	    <tr>
		  <td></td>
		  <td>
            <input class = "button-1" type = "submit" name = "Insert" id = "submit" value = "Insert">
			<input class = "button-2" type = "reset" name = "reset" value = "Reset">
          </td>
	    </tr>   	
      </table>
    </form>
  </center>
  <div>
    <footer>
      <pre> Copyright &#169; Sri Lanka Institute of Information Technology, 2017 - All rights Reserved. </pre>
    </footer>
  </div>
</body>
</html>
&#13;
&#13;
&#13;

答案 1 :(得分:2)

  

供参考:https://www.w3schools.com/js/js_validation.asp

function validateForm() {

 var item = document.forms["myForm"]["item"].value;
 var type = document.forms["myForm"]["type"].value;
 var category = document.forms["myForm"]["category"].value;
 var title = document.forms["myForm"]["title"].value;
 var publisher = document.forms["myForm"]["publisher"].value;
 var year = document.forms["myForm"]["year"].value;
 var place = document.forms["myForm"]["place"].value;
 var Abstract = document.forms["myForm"]["Abstract"].value;
 var medium = document.forms["myForm"]["medium"].value;
 var edition = document.forms["myForm"]["edition"].value;
 var ISBN_number = document.forms["myForm"]["ISBN_number"].value;
 var shelf = document.forms["myForm"]["shelf"].value;
 var call = document.forms["myForm"]["call"].value;
 var barcode = document.forms["myForm"]["barcode"].value;
 var pages = document.forms["myForm"]["pages"].value;
 var Barcode = barcode.length;

    if (item == "" || type == "" || category == "" || title == "" || publisher == "" || year == "" || place == "" || Abstract == "" || medium == "" || edition == "" || number == "" || shelf == "" || call == "" || barcode == "" || pages == "") {

        alert("All Field must be filled out");
        return false;
    }

		
  if ((Barcode >= 17) || (Barcode < 12)) {
	alert("Password should have 12 - 16 characters");
    return false;
  }
		 	  		
  if (isNaN(barcode)) {
    alert("Incorrect Bar Code Number");
	return false;
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE HTML>
<html>
  <head>
    <title> SLIIT LIBRARY </title>
    <link rel = "stylesheet" type = "text/css" href = "Style.css"/>
    <script type = "text/JavaScript" src = "FormValidation.js"></script>
    <script type = "text/javascript" src = "http://code.jquery.com/jquery-2.1.4.min.js"></script> 
    <script src = "//cdn.jsdelivr.net/webshim/1.14.5/polyfiller.js"></script>

    <script>

	  webshims.setOptions
	  ('forms-ext', 
		{
		  types: 'date'
		}
	  );
	
	  webshims.polyfill
	  (
        'forms forms-ext'
	  );
		
	  $.webshims.formcfg = 
	  {	
		en: 
		{
	      dFormat: '-',
	  	  dateSigns: '-',
		  patterns: 
		  {
		    d: "yy-mm-dd"
		  }
		}
	  };

    </script>

    <style type="text/css">
    	body {
  background-color: #9cb4c0;
  background-size: 100% 100%;
}
	
.div-1 {
  float: right;
  padding: 20px 10px;
}
	
h2 {	
  text-align: right;
}
	
a:link {
  color: rgb(7, 19, 86);
  background-color: transparent;
  text-decoration: none;
  font-size: 20px;
}

a:visited {
  color: orange;
  background-color: transparent;
  text-decoration: none;
}
	
a:active {
  color: rgb(216, 120, 10);
  background-color: transparent;
  text-decoration: underline;
}

.list-1 {
  list-style-type: none;
  overflow: hidden;
  margin: 0;
  padding: 0;
  text-align : right;
}

.list-1:active {
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
.list-1 li  a {
  float: right;
  display: block;
  padding: 8px;
  text-align: center;
  border: 1px solid #e7e7e7;
  background-color: #f3f3f3;
  color: #666;
}
	
.list-1 li a:hover {
  background-color: #ff6c00;
}
	
.list-2 {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #228bbb;
}
	
.list-2 a {
  border-right: 1px solid #bbb;
  float: left;
  display: block;
  padding: 14px 16px;		
  color: rgb(7, 19, 86);
}
	
.list-2 a:hover:not(.active) {
  background-color: #ff6c00;
}
	
.list-2 .active {
  background-color: #ff6c00;
}

.button-1, .button-2 {
  background-color: #2980B9;
  color: white;
  font-family: arial;
  border: none;
  padding: 10px 10px;
  text-align: center;
  display: inline-block;
  margin: 4px 8px;
  -webkit-transition-duration: 0.4s;
  transition-duration: 0.4s;
  cursor: pointer;
  font-style: italic;
  outline: none;
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

.button-1:active, .button-2:active {
  background-color: #2980B9;
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
footer {
  clear: both;
  position: relative;
  z-index: 10;
  height: 1em;
  text-align: center;
  background-color: #228bbb;
  color: black;
}


</style>


  </head>
  <body>
    <img src = "SLIIT.png" width = "300" height = "200" />
    <div class = "div-1">
      <ul class = "list-1">
	    <li>
          <a href = "Register to the system.html" target = "_blank"> Register </a>
        </li>
	    <li>
          <a href = "Login to the system.html" target = "_blank"> Staff </a> 
        </li>
      </ul>

      <h2> 
        <a href = "/SLIIT LIBRARY/" target = "_blank"> SLIIT LIBRARY</a>
      </h2>
    </div>

    <ul class = "list-2">
      <li> <a href = "/Home/" target = "_blank"> Home </a> </li>
      <li> <a href = "/Add Material/" target = "_blank"> Add Material </a> </li>
      <li> <a href = "/Search/" target = "_blank"> Search </a> </li> 
      <li> <a href = "/Borrowed Books/" target = "_blank"> Borrowed Books </a> </li>
      <li> <a href = "/Member Details/" target = "_blank"> Member Details </a> </li>
  </ul>
  <center>
    <h3>Adding New Material</h3>
    <form id="add" name="myForm" method="POST" action="" onsubmit="return validateForm()" novalidate>
      <table>
	    <tr>
		  <td>Item Number</td>
		  <td><input type = "text" name = "Item Number" id = "item" placeholder = "B001"></td>
	    </tr>
		
	    <tr>
		  <td>Item Type</td>
		  <td>
            <select name = "Item Type" id = "type">
		      <option>---Select One---</option>
			  <option>Book</option>
			  <option>Standard</option>
			  <option>Journal</option>
			  <option>CD</option>
			  <option>Article</option>
            </select>
		  </td>
	    </tr>
	
    	<tr>
		  <td>Category	</td>
		  <td>
            <select name = "Category" id = "category">
			  <option>---Select One---</option>
			  <option>Information Technology</option>
			  <option>Business Management</option>
			  <option>Enginerring</option>
			  <option>General</option>
            </select>
		  </td>
	    </tr>
	
	    <tr>
		  <td>Title	</td>
		  <td><input type = "text" name = "Title" id = "title" placeholder = "JavaScript and PHP"></td>
	    </tr>
		
	    <tr>
		  <td>Publisher	</td>
		  <td><input type = "text" name = "Publisher" id = "publisher" placeholder = "JavaScript and PHP"></td>
	    </tr>
	
	    <tr>
		  <td>Year of Publication	</td>
		  <td><input type = "date" name = "Year of Publication" id = "year"></td>
	    </tr>
	
	    <tr>
		  <td>Place of Publisher</td>
	      <td><input type = "text" name = "Place of Publisher" id = "place" placeholder = "England"></td>
	    </tr>
	
	    <tr>
		  <td>Abstract	</td>
		  <td><textarea name = "Abstract" id = "Abstract" rows = "3" cols = "18"></textarea>
	    </tr>
	
	    <tr>
		  <td>Medium	</td>
		  <td>
            <select name = "Medium" id = "medium">
			  <option>---Select One---</option>
			  <option>English</option>
			  <option>Sinhala</option>
			  <option>Tamil</option>
            </select>
		  </td>
	    </tr>
	
	    <tr>
		  <td>Edition	</td>
		  <td><select name = "Edition" id = "edition"/>
			<option>---Select One---</option>
		  </td>
	    </tr>
	
	    <tr>
		  <td>ISBN/ISSN No	</td>
		  <td><input type = "text" name = "ISBN/ISSN No" id = "ISBN_number"></td>
	    </tr>
	
	    <tr>
		  <td>Shelf Number	</td>
		  <td><input type = "number" name = "Shelf Number" id = "shelf" min = "1"></td>
	    </tr>
	
	    <tr>
		  <td>Call Number	</td>
		  <td><input type = "number" name = "Call Number" id = "call" min = "1"></td>
	    </tr>
	
	    <tr>
		  <td>Bar Code No	</td>
		  <td><input type = "number" name = "Bar Code No" id = "barcode" min = "0"></td>
	    </tr>
	
	    <tr>
		  <td>No of Pages </td>
		  <td><input type = "number" name = "No of Pages" id = "pages" min = "1"></td>
	    </tr>

	    <tr>
		  <td></td>
		  <td>
            <input class = "button-1" type = "submit" name = "Insert" id = "submit" value = "Insert">
			<input class = "button-2" type = "reset" name = "reset" value = "Reset">
          </td>
	    </tr>   	
      </table>
    </form>
  
  </center>
  <div>

    <footer>
      <pre> Copyright &#169; Sri Lanka Institute of Information Technology, 2017 - All rights Reserved. </pre>
    </footer>
  </div>
</body>
</html>

答案 2 :(得分:1)

您的代码中存在语法错误。在线:

if (item == "" || type == "" || category == "" || title == "" || publisher == "" || year == "" || place == "" || Abstract == "" || medium == "" || edition == "" || number == "" || shelf == "" || cal == "" || barcode == "" || pages == "")

,您引用变量cal,而在此行中声明了一个名为call的变量:

var call = document.add.call.value;

修改:此外,您错误地使用了<select>。在您的代码中:

<select name = "Item Type" id = "type"/>

正确使用:

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<form name="myForm">
  <select name="selectField">
    <option value="choice1">Choice 1</option>
    <option value="choice2" selected="selected">Choice 2</option>
    <option value="choice3">Choice 3</option>
  </select>
</form>

<script type="text/javascript">
  var selectField = document["myForm"].selectField; // document.myForm is correct as well
  console.log(selectField.value);
</script>
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AFAIK,您只能通过<form>属性引用name<input><select>元素也是如此。除非您使用document.getElementById(id)。更多例子:

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&#13;
<form name="my form" id="myForm">
  <input type="text" name="foo bar" id="foo_bar" />
</form>

<script type="text/javascript">
  var myForm = document["my form"];
  var myFormById = document.getElementById("myForm");
  console.log(myForm === myFormById);
  var fooBar = myForm["foo bar"];
  var fooBarById = document.getElementById("foo_bar");
  console.log(fooBar === fooBarById);
</script>
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答案 3 :(得分:1)

虽然你有一个很好的答案我想解释你的代码中发生了什么。

你定义了这个:

var item = document.add.item.value;

您正在尝试使用比较来验证:

if(item == "");

项目未定义,因此它不等于&#34;&#34; (空字符串),这就是您的代码验证的原因。

我猜你试图用这种语法来定义你的变量:

var item = document.forms.add.item.value;

您忘记包含对象表单,这就是您的变量未定义的原因。

只需在.forms之后添加document即可获得每个输入的值:

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function validateForm() {
  var item = document.forms.add.item.value;
  var type = document.forms.add.type.value;
  var category = document.forms.add.category.value;
  var title = document.forms.add.title.value;
  var publisher = document.forms.add.publisher.value;
  var year = document.forms.add.year.value;
  var place = document.forms.add.place.value;
  var Abstract = document.forms.add.Abstract.value;
  var medium = document.forms.add.medium.value;
  var edition = document.forms.add.edition.value;
  var number = document.forms.add.number.value;
  var shelf = document.forms.add.shelf.value;
  var call = document.forms.add.call.value;
  var barcode = document.forms.add.barcode.value;
  var pages = document.forms.add.pages.value;
  var Barcode = barcode.length;
	
  if (item == "" || type == "" || category == "" || title == "" || publisher == "" || year == "" || place == "" || Abstract == "" || medium == "" || edition == "" || number == "" || shelf == "" || call == "" || barcode == "" || pages == "") {
    alert("Please fill all details");
    return false;
  }
		
  if ((Barcode >= 17) || (Barcode < 12)) {
	alert("Password should have 12 - 16 characters");
    return false;
  }
		 	  		
  if (isNaN(barcode)) {
    alert("Incorrect Bar Code Number");
	return false;
  }
}
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body {
  background-color: #9cb4c0;
  background-size: 100% 100%;
}
	
.div-1 {
  float: right;
  padding: 20px 10px;
}
	
h2 {	
  text-align: right;
}
	
a:link {
  color: rgb(7, 19, 86);
  background-color: transparent;
  text-decoration: none;
  font-size: 20px;
}

a:visited {
  color: orange;
  background-color: transparent;
  text-decoration: none;
}
	
a:active {
  color: rgb(216, 120, 10);
  background-color: transparent;
  text-decoration: underline;
}

.list-1 {
  list-style-type: none;
  overflow: hidden;
  margin: 0;
  padding: 0;
  text-align : right;
}

.list-1:active {
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
.list-1 li  a {
  float: right;
  display: block;
  padding: 8px;
  text-align: center;
  border: 1px solid #e7e7e7;
  background-color: #f3f3f3;
  color: #666;
}
	
.list-1 li a:hover {
  background-color: #ff6c00;
}
	
.list-2 {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #228bbb;
}
	
.list-2 a {
  border-right: 1px solid #bbb;
  float: left;
  display: block;
  padding: 14px 16px;		
  color: rgb(7, 19, 86);
}
	
.list-2 a:hover:not(.active) {
  background-color: #ff6c00;
}
	
.list-2 .active {
  background-color: #ff6c00;
}

.button-1, .button-2 {
  background-color: #2980B9;
  color: white;
  font-family: arial;
  border: none;
  padding: 10px 10px;
  text-align: center;
  display: inline-block;
  margin: 4px 8px;
  -webkit-transition-duration: 0.4s;
  transition-duration: 0.4s;
  cursor: pointer;
  font-style: italic;
  outline: none;
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

.button-1:active, .button-2:active {
  background-color: #2980B9;
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}
	
footer {
  clear: both;
  position: relative;
  z-index: 10;
  height: 1em;
  text-align: center;
  background-color: #228bbb;
  color: black;
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
  <head>
    <title> SLIIT LIBRARY </title>
    <link rel = "stylesheet" type = "text/css" href = "Style.css"/>
    
  </head>
  <body>

    <img src = "SLIIT.png" width = "300" height = "200" />
    <div class = "div-1">
      <ul class = "list-1">
	    <li>
          <a href = "Register to the system.html" target = "_blank"> Register </a>
        </li>
	    <li>
          <a href = "Login to the system.html" target = "_blank"> Staff </a> 
        </li>
      </ul>

      <h2> 
        <a href = "/SLIIT LIBRARY/" target = "_blank"> SLIIT LIBRARY</a>
      </h2>
    </div>

    <ul class = "list-2">
      <li> <a href = "/Home/" target = "_blank"> Home </a> </li>
      <li> <a href = "/Add Material/" target = "_blank"> Add Material </a> </li>
      <li> <a href = "/Search/" target = "_blank"> Search </a> </li> 
      <li> <a href = "/Borrowed Books/" target = "_blank"> Borrowed Books </a> </li>
      <li> <a href = "/Member Details/" target = "_blank"> Member Details </a> </li>
  </ul>

  <center>
    <h3>Adding New Material</h3>
    <form id = "add" name = "SLIIT Library" method = "POST" action = "" onsubmit = "return validateForm()">
      <table>
	    <tr>
		  <td>Item Number</td>
		  <td><input type = "text" name = "Item Number" id = "item" placeholder = "B001"></td>
	    </tr>
		
	    <tr>
		  <td>Item Type</td>
		  <td>
            <select name = "Item Type" id = "type">
		      <option>---Select One---</option>
			  <option>Book</option>
			  <option>Standard</option>
			  <option>Journal</option>
			  <option>CD</option>
			  <option>Article</option>
            </select>
		  </td>
	    </tr>
	
    	<tr>
		  <td>Category	</td>
		  <td>
            <select name = "Category" id = "category">
			  <option>---Select One---</option>
			  <option>Information Technology</option>
			  <option>Business Management</option>
			  <option>Enginerring</option>
			  <option>General</option>
            </select>
		  </td>
	    </tr>
	
	    <tr>
		  <td>Title	</td>
		  <td><input type = "text" name = "Title" id = "title" placeholder = "JavaScript and PHP"></td>
	    </tr>
		
	    <tr>
		  <td>Publisher	</td>
		  <td><input type = "text" name = "Publisher" id = "publisher" placeholder = "JavaScript and PHP"></td>
	    </tr>
	
	    <tr>
		  <td>Year of Publication	</td>
		  <td><input type = "date" name = "Year of Publication" id = "year"></td>
	    </tr>
	
	    <tr>
		  <td>Place of Publisher</td>
	      <td><input type = "text" name = "Place of Publisher" id = "place" placeholder = "England"></td>
	    </tr>
	
	    <tr>
		  <td>Abstract	</td>
		  <td><textarea name = "Abstract" id = "Abstract" rows = "3" cols = "18"></textarea>
	    </tr>
	
	    <tr>
		  <td>Medium	</td>
		  <td>
            <select name = "Medium" id = "medium">
			  <option>---Select One---</option>
			  <option>English</option>
			  <option>Sinhala</option>
			  <option>Tamil</option>
            </select>
		  </td>
	    </tr>
	
	    <tr>
		  <td>Edition	</td>
		  <td><select name = "Edition" id = "edition"/>
			<option>---Select One---</option>
		  </td>
	    </tr>
	
	    <tr>
		  <td>ISBN/ISSN No	</td>
		  <td><input type = "text" name = "ISBN/ISSN No" id = "number"></td>
	    </tr>
	
	    <tr>
		  <td>Shelf Number	</td>
		  <td><input type = "number" name = "Shelf Number" id = "shelf" min = "1"></td>
	    </tr>
	
	    <tr>
		  <td>Call Number	</td>
		  <td><input type = "number" name = "Call Number" id = "call" min = "1"></td>
	    </tr>
	
	    <tr>
		  <td>Bar Code No	</td>
		  <td><input type = "number" name = "Bar Code No" id = "barcode" min = "0"></td>
	    </tr>
	
	    <tr>
		  <td>No of Pages </td>
		  <td><input type = "number" name = "No of Pages" id = "pages" min = "1"></td>
	    </tr>

	    <tr>
		  <td></td>
		  <td>
            <input class = "button-1" type = "submit" name = "Insert" id = "submit" value = "Insert">
			<input class = "button-2" type = "reset" name = "reset" value = "Reset">
          </td>
	    </tr>   	
      </table>
    </form>
  </center>
  <div>
    <footer>
      <pre> Copyright &#169; Sri Lanka Institute of Information Technology, 2017 - All rights Reserved. </pre>
    </footer>
  </div>
</body>
</html>
&#13;
&#13;
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