所以我的表格有问题。设置了多种验证技术。 我最明显的两个问题是在程序开始时弹出的警报，但只有在激活onblur（）并且我的update（）函数返回false值时才会弹出。 而且，当我对着我的琴弦进行测试时，我的常规表达式坚持要求我提供虚假条件。 完成的表单应验证各种信息并更新费用输入中的值。 真的坚持这个......
window.onload = initPage;
/*initPage()
Initializes the contents of the Web page */
function initPage() {
//declare array variable dataFields points to input elements from the expenseEntry class
var dataFields = new Array();
var allElems = document.getElementsByTagName("*");
for( var i = 0; i < allElems.length; i ++) {
if(allElems[i].className == "expenseEntry") dataFields.push(allElems[i]);
}
//add onblur event that runs update() function whenever focus leaves a datafield.
for(var i = 0; i < dataFields.length; i++) {
dataFields[i].onblur = update();
}
//event handler that runs validateForm() upon submitting the form.
document.forms[0].onsubmit = validateForm;
}
/* testLength()
Tests a field for its length. */
function testLength(field) {
if (field.value.length == 0) {
// Change the background color to white or yellow depending on the lenght.
field.style.backgroundColor = "yellow";
return false;
}
else field.style.backgroundColor = "white";
return true;
}
/* testPattern()
Tests a field for its pattern. */
function testPattern(field, regx) {
if (regx.test(field)) {
field.style.backgroundColor = "white";
field.style.color = "black";
return true;
}
else field.style.backgroundColor = "yellow";
field.style.color = "red";
return false;
}
/* validateForm()
Validates a Web form */
function validateForm() {
var isValid = true;
//testLength function with lname field also for fname, address, and summary to make sure an entry has been made.
if (testLength(document.forms[0].lname) == false) {
isValid = false;}
if (testLength(document.forms[0].fname) == false) {
isValid = false;}
if (testLength(document.forms[0].address) == false) {
isValid = false;}
if (testLength(document.forms[0].summary) == false) {
isValid = false;}
//must match ACT followed by six digits
if (testPattern(document.forms[0].account,/^ACT\d{6}$/) == false)
{isValid = false;}
//dept field. regx should match DEPT followed by three digits
if (testPattern(document.forms[0].department.value,/^DEPT\d{3}$/) == false)
{isValid = false;}
//Project field with regx should match PROJ followed by five digits
if (testPattern(document.forms[0].project,/^PROJ\d{5}$/) == false)
{isValid = false;}
//call testPattern function to test SSN. match 9 digits or text string
if (testPattern(document.forms[0].ssn,/^\d{3}-\d{2}-\d{4}$/) == false)
{isValid = false;}
if (isValid == false)
{alert("Please fill out all required fields in the proper format.");}
return isValid;
}
/* calcRow
Calculates the costs within one row of the travel report */
function calcRow(row) {
var travel = parseFloat(document.forms[0].elements["travel"+row].value);
var lodge = parseFloat(document.forms[0].elements["lodge"+row].value);
var meal = parseFloat(document.forms[0].elements["meal"+row].value);
return travel+lodge+meal;
}
/* calcTotal()
Calculates the total cost of the travel */
function calcTotal() {
//create a variable totalEXP
var totalExp = 0;
//create a for loop that runs 1 t0 4
for (var i = 1; i <= 4; i++)
// increase the value of totalExp by value returned for calcRow
{ totalExp += calcRow(i);}
return totalExp;
}
/* upDate()
Updates the total travel cost */
function update() {
//create a variable numRegExp
var numRegExp = /^\d*(\.\d{0,2})?$/;
// Test weather the currently selected object matches the numRegExp pattern
if (numRegExp.test(this.value)){
// Display the value of the current object to 2 decimal places.
parseInt(this.value).toFixed(2);
//insert a for loop that runs 1 to 4 for all the expense rows in the form
for (var i = 1; i < 4; i++) {
//Set the value of sub[i] field to the value returned by calcRow()
document.forms[0].elements["sub" + i].value = calcRow(i).toFixed(2);
//set the value of the total field equal to the value returned by the calTotal() function
document.forms[0].total.value = calcTotal().toFixed(2);
}
}
//if the condition is not met display alert and change value.
else if (numRegExp.test(this.value) == false) {
alert("Invalid currency value");
(this.value = "0.00");
this.focus();
}
}
body {background: white url(back.jpg) repeat-y scroll 0px 0px}
#links {position: absolute; top: 10px; left: 0px}
#main {border: 1px solid black; width: 640px; padding: 5px;
background-color: white; margin-left: 100px; margin-top: 0px}
span {color: red; font-family: Arial, Helvetica, sans-serif; font-size: 9pt}
table {font-size: 8pt; width: 630px; margin-top: 5px; margin-bottom: 0px}
th {background-color: rgb(153,204,255); text-align: left; font-weight: normal;
font-family: Arial, Helvetica, sans-serif}
#reporttitle {background-color: white; text-align: center; font-family: Arial, Helvetica, sans-serif;
font-size: 18pt; color: rgb(153,204,255); font-weight: bold}
input {width: 100%; font-size: 8pt}
select {width: 100%; font-size: 8pt}
#lname, #fname {width: 150px}
#account, #department, #project {width: 150px}
#traveltable th {text-align: center}
#subhead {width: 100px}
#travelexphead, #lodgeexphead, #mealexphead {width: 80px}
#date1, #date2, #date3, #date4 {text-align: center}
#travel1, #travel2, #travel3, #travel4 {text-align: right}
#lodge1, #lodge2, #lodge3, #lodge4 {text-align: right}
#meal1, #meal2, #meal3, #meal4 {text-align: right}
#sub1, #sub2, #sub3, #sub4,#total {text-align: right}
#traveltable #totalhead {text-align: right}
textarea {height: 100px; width: 100%}
#main #psub {text-align: center}
#main p input {width: 190px; background-color: rgb(153,204,255); color: black;
letter-spacing: 5}<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<!--
New Perspectives on JavaScript, 2nd Edition
Tutorial 5
Case Problem 2
Expense Report Form
Author: Gavin Macken
Date: 8 March `15
Filename: exp.htm
Supporting files: back.jpg, exp.css, links.jpg, logo.jpg, report.js
-->
<title>Expense Report</title>
<link href="exp.css" rel="stylesheet" type="text/css" />
<script src = "report.js" type = "text/javascript"></script>
</head>
<body>
<form id="expform" method="post" action="done.htm">
<div id="links"><img src="links.jpg" alt="" /></div>
<div id="main">
<p><img src="logo.jpg" alt="DeLong Enterprises" /></p>
<table cellspacing="2">
<tr>
<th colspan="5" id="reporttitle">Travel Expense Report</th>
</tr>
<tr>
<th>Name (Last)<span>*</span></th>
<th>(First)<span>*</span></th>
<th>(Initial)</th>
<th>Account<span>*</span></th>
<td><input name="account" id="account" /></td>
</tr>
<tr>
<td><input name="lname" id="lname"/></td>
<td><input name="fname" id="fname"/></td>
<td><input name="init" id="init"/></td>
<th>Department<span>*</span></th>
<td><input name="department" id="department" /></td>
</tr>
<tr>
<th>Social Security Number<span>*</span></th>
<td colspan="2"><input name="ssn" id="ssn" /></td>
<th>Project<span>*</span></th>
<td><input name="project" id="project" /></td>
</tr>
</table>
<table cellspacing="2">
<tr>
<th>Send Check to:<span>*</span></th>
<th>Trip Summary<span>*</span></th>
</tr>
<tr>
<td>
<textarea id="address" name="address" rows="" cols=""></textarea>
</td>
<td>
<textarea id="summary" name="summary" rows="" cols=""></textarea>
</td>
</tr>
</table>
<table id="traveltable" cellspacing="2">
<tr>
<th id="datehead">Travel Date</th>
<th id="travelexphead">Travel Cost</th>
<th id="traveltypehead">Type</th>
<th id="lodgeexphead">Lodging</th>
<th id="mealexphead">Meals</th>
<th id="subhead">Total</th>
</tr>
<tr>
<td><input name="date1" id="date1" /></td>
<td><input name="travel1" id="travel1" value="0.00" class="expenseEntry" /></td>
<td><select name="traveltype1" id="traveltype1">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td><input name="lodge1" id="lodge1" value="0.00" class="expenseEntry" /></td>
<td><input name="meal1" id="meal1" value="0.00" class="expenseEntry" /></td>
<td><input name="sub1" id="sub1" value="0.00" readonly="readonly" /></td>
</tr>
<tr>
<td><input name="date2" id="date2" /></td>
<td><input name="travel2" id="travel2" value="0.00" class="expenseEntry" /></td>
<td><select name="traveltype2" id="traveltype2">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td><input name="lodge2" id="lodge2" value="0.00" class="expenseEntry" /></td>
<td><input name="meal2" id="meal2" value="0.00" class="expenseEntry" /></td>
<td><input name="sub2" id="sub2" value="0.00" readonly="readonly" /></td>
</tr>
<tr>
<td><input name="date3" id="date3" /></td>
<td><input name="travel3" id="travel3" value="0.00" class="expenseEntry" /></td>
<td><select name="traveltype3" id="traveltype3">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td><input name="lodge3" id="lodge3" value="0.00" class="expenseEntry" /></td>
<td><input name="meal3" id="meal3" value="0.00" class="expenseEntry" /></td>
<td><input name="sub3" id="sub3" value="0.00" readonly="readonly" /></td>
</tr>
<tr>
<td><input name="date4" id="date4" /></td>
<td><input name="travel4" id="travel4" value="0.00" class="expenseEntry" /></td>
<td><select name="traveltype4" id="traveltype4">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td><input name="lodge4" id="lodge4" value="0.00" class="expenseEntry" /></td>
<td><input name="meal4" id="meal4" value="0.00" class="expenseEntry" /></td>
<td><input name="sub4" id="sub4" value="0.00" readonly="readonly" /></td>
</tr>
<tr>
<th colspan="5" id="totalhead">TOTAL</th>
<td><input id="total" name="total" readonly="readonly" value="0.00" /></td>
</tr>
<tr>
<td colspan="6"><span>* - Indicates a required field</span></td>
</tr>
</table>
<p id="psub">
<input type="submit" value="Submit Report" />
</p>
</div>
</form>
</body>
</html>
答案 0 :(得分：0)
您正在针对正则表达式测试DOM元素，这没有意义。 regx.test()的参数必须是字符串。您需要使用该字段的值：
if (regx.test(field.value)) {
您将onblur属性设置错误。应将其设置为update函数，但此时您正在调用该函数。它应该是：
dataFields[i].onblur = update;
当您为.value字段调用testPattern时，您使用的是department媒体资源。但是testPattern期望参数是元素，而不是值。它应该是：
if (testPattern(document.forms[0].department, /^DEPT\d{3}$/) == false)
window.onload = initPage;
/*initPage()
Initializes the contents of the Web page */
function initPage() {
//declare array variable dataFields points to input elements from the expenseEntry class
var dataFields = new Array();
var allElems = document.getElementsByTagName("*");
for (var i = 0; i < allElems.length; i++) {
if (allElems[i].className == "expenseEntry") dataFields.push(allElems[i]);
}
//add onblur event that runs update() function whenever focus leaves a datafield.
for (var i = 0; i < dataFields.length; i++) {
dataFields[i].onblur = update;
}
//event handler that runs validateForm() upon submitting the form.
document.forms[0].onsubmit = validateForm;
}
/* testLength()
Tests a field for its length. */
function testLength(field) {
if (field.value.length == 0) {
// Change the background color to white or yellow depending on the lenght.
field.style.backgroundColor = "yellow";
return false;
} else field.style.backgroundColor = "white";
return true;
}
/* testPattern()
Tests a field for its pattern. */
function testPattern(field, regx) {
if (regx.test(field.value)) {
field.style.backgroundColor = "white";
field.style.color = "black";
return true;
} else field.style.backgroundColor = "yellow";
field.style.color = "red";
return false;
}
/* validateForm()
Validates a Web form */
function validateForm() {
var isValid = true;
//testLength function with lname field also for fname, address, and summary to make sure an entry has been made.
if (testLength(document.forms[0].lname) == false) {
isValid = false;
}
if (testLength(document.forms[0].fname) == false) {
isValid = false;
}
if (testLength(document.forms[0].address) == false) {
isValid = false;
}
if (testLength(document.forms[0].summary) == false) {
isValid = false;
}
//must match ACT followed by six digits
if (testPattern(document.forms[0].account, /^ACT\d{6}$/) == false)
{
isValid = false;
}
//dept field. regx should match DEPT followed by three digits
if (testPattern(document.forms[0].department, /^DEPT\d{3}$/) == false)
{
isValid = false;
}
//Project field with regx should match PROJ followed by five digits
if (testPattern(document.forms[0].project, /^PROJ\d{5}$/) == false)
{
isValid = false;
}
//call testPattern function to test SSN. match 9 digits or text string
if (testPattern(document.forms[0].ssn, /^\d{3}-\d{2}-\d{4}$/) == false) {
isValid = false;
}
if (isValid == false)
{
alert("Please fill out all required fields in the proper format.");
}
return isValid;
}
/* calcRow
Calculates the costs within one row of the travel report */
function calcRow(row) {
var travel = parseFloat(document.forms[0].elements["travel" + row].value);
var lodge = parseFloat(document.forms[0].elements["lodge" + row].value);
var meal = parseFloat(document.forms[0].elements["meal" + row].value);
return travel + lodge + meal;
}
/* calcTotal()
Calculates the total cost of the travel */
function calcTotal() {
//create a variable totalEXP
var totalExp = 0;
//create a for loop that runs 1 t0 4
for (var i = 1; i <= 4; i++)
// increase the value of totalExp by value returned for calcRow
{
totalExp += calcRow(i);
}
return totalExp;
}
/* upDate()
Updates the total travel cost */
function update() {
//create a variable numRegExp
var numRegExp = /^\d*(\.\d{0,2})?$/;
// Test weather the currently selected object matches the numRegExp pattern
if (numRegExp.test(this.value)) {
// Display the value of the current object to 2 decimal places.
parseInt(this.value).toFixed(2);
//insert a for loop that runs 1 to 4 for all the expense rows in the form
for (var i = 1; i < 4; i++) {
//Set the value of sub[i] field to the value returned by calcRow()
document.forms[0].elements["sub" + i].value = calcRow(i).toFixed(2);
//set the value of the total field equal to the value returned by the calTotal() function
document.forms[0].total.value = calcTotal().toFixed(2);
}
}
//if the condition is not met display alert and change value.
else if (numRegExp.test(this.value) == false) {
alert("Invalid currency value");
(this.value = "0.00");
this.focus();
}
}body {
background: white url(back.jpg) repeat-y scroll 0px 0px
}
#links {
position: absolute;
top: 10px;
left: 0px
}
#main {
border: 1px solid black;
width: 640px;
padding: 5px;
background-color: white;
margin-left: 100px;
margin-top: 0px
}
span {
color: red;
font-family: Arial, Helvetica, sans-serif;
font-size: 9pt
}
table {
font-size: 8pt;
width: 630px;
margin-top: 5px;
margin-bottom: 0px
}
th {
background-color: rgb(153, 204, 255);
text-align: left;
font-weight: normal;
font-family: Arial, Helvetica, sans-serif
}
#reporttitle {
background-color: white;
text-align: center;
font-family: Arial, Helvetica, sans-serif;
font-size: 18pt;
color: rgb(153, 204, 255);
font-weight: bold
}
input {
width: 100%;
font-size: 8pt
}
select {
width: 100%;
font-size: 8pt
}
#lname,
#fname {
width: 150px
}
#account,
#department,
#project {
width: 150px
}
#traveltable th {
text-align: center
}
#subhead {
width: 100px
}
#travelexphead,
#lodgeexphead,
#mealexphead {
width: 80px
}
#date1,
#date2,
#date3,
#date4 {
text-align: center
}
#travel1,
#travel2,
#travel3,
#travel4 {
text-align: right
}
#lodge1,
#lodge2,
#lodge3,
#lodge4 {
text-align: right
}
#meal1,
#meal2,
#meal3,
#meal4 {
text-align: right
}
#sub1,
#sub2,
#sub3,
#sub4,
#total {
text-align: right
}
#traveltable #totalhead {
text-align: right
}
textarea {
height: 100px;
width: 100%
}
#main #psub {
text-align: center
}
#main p input {
width: 190px;
background-color: rgb(153, 204, 255);
color: black;
letter-spacing: 5
}<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<!--
New Perspectives on JavaScript, 2nd Edition
Tutorial 5
Case Problem 2
Expense Report Form
Author: Gavin Macken
Date: 8 March `15
Filename: exp.htm
Supporting files: back.jpg, exp.css, links.jpg, logo.jpg, report.js
-->
<title>Expense Report</title>
<link href="exp.css" rel="stylesheet" type="text/css" />
<script src="report.js" type="text/javascript"></script>
</head>
<body>
<form id="expform" method="post" action="done.htm">
<div id="links">
<img src="links.jpg" alt="" />
</div>
<div id="main">
<p>
<img src="logo.jpg" alt="DeLong Enterprises" />
</p>
<table cellspacing="2">
<tr>
<th colspan="5" id="reporttitle">Travel Expense Report</th>
</tr>
<tr>
<th>Name (Last)<span>*</span>
</th>
<th>(First)<span>*</span>
</th>
<th>(Initial)</th>
<th>Account<span>*</span>
</th>
<td>
<input name="account" id="account" />
</td>
</tr>
<tr>
<td>
<input name="lname" id="lname" />
</td>
<td>
<input name="fname" id="fname" />
</td>
<td>
<input name="init" id="init" />
</td>
<th>Department<span>*</span>
</th>
<td>
<input name="department" id="department" />
</td>
</tr>
<tr>
<th>Social Security Number<span>*</span>
</th>
<td colspan="2">
<input name="ssn" id="ssn" />
</td>
<th>Project<span>*</span>
</th>
<td>
<input name="project" id="project" />
</td>
</tr>
</table>
<table cellspacing="2">
<tr>
<th>Send Check to:<span>*</span>
</th>
<th>Trip Summary<span>*</span>
</th>
</tr>
<tr>
<td>
<textarea id="address" name="address" rows="" cols=""></textarea>
</td>
<td>
<textarea id="summary" name="summary" rows="" cols=""></textarea>
</td>
</tr>
</table>
<table id="traveltable" cellspacing="2">
<tr>
<th id="datehead">Travel Date</th>
<th id="travelexphead">Travel Cost</th>
<th id="traveltypehead">Type</th>
<th id="lodgeexphead">Lodging</th>
<th id="mealexphead">Meals</th>
<th id="subhead">Total</th>
</tr>
<tr>
<td>
<input name="date1" id="date1" />
</td>
<td>
<input name="travel1" id="travel1" value="0.00" class="expenseEntry" />
</td>
<td>
<select name="traveltype1" id="traveltype1">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td>
<input name="lodge1" id="lodge1" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="meal1" id="meal1" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="sub1" id="sub1" value="0.00" readonly="readonly" />
</td>
</tr>
<tr>
<td>
<input name="date2" id="date2" />
</td>
<td>
<input name="travel2" id="travel2" value="0.00" class="expenseEntry" />
</td>
<td>
<select name="traveltype2" id="traveltype2">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td>
<input name="lodge2" id="lodge2" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="meal2" id="meal2" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="sub2" id="sub2" value="0.00" readonly="readonly" />
</td>
</tr>
<tr>
<td>
<input name="date3" id="date3" />
</td>
<td>
<input name="travel3" id="travel3" value="0.00" class="expenseEntry" />
</td>
<td>
<select name="traveltype3" id="traveltype3">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td>
<input name="lodge3" id="lodge3" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="meal3" id="meal3" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="sub3" id="sub3" value="0.00" readonly="readonly" />
</td>
</tr>
<tr>
<td>
<input name="date4" id="date4" />
</td>
<td>
<input name="travel4" id="travel4" value="0.00" class="expenseEntry" />
</td>
<td>
<select name="traveltype4" id="traveltype4">
<option>air</option>
<option>auto</option>
<option>taxi</option>
<option>train</option>
</select>
</td>
<td>
<input name="lodge4" id="lodge4" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="meal4" id="meal4" value="0.00" class="expenseEntry" />
</td>
<td>
<input name="sub4" id="sub4" value="0.00" readonly="readonly" />
</td>
</tr>
<tr>
<th colspan="5" id="totalhead">TOTAL</th>
<td>
<input id="total" name="total" readonly="readonly" value="0.00" />
</td>
</tr>
<tr>
<td colspan="6"><span>* - Indicates a required field</span>
</td>
</tr>
</table>
<p id="psub">
<input type="submit" value="Submit Report" />
</p>
</div>
</form>
</body>
</html>