我试图在JavaScript中警告表单文本框的值,但它不起作用,而我的其他表单具有相同的JavaScript代码,它们正常工作。我花了很多时间来解决这个问题,但没有成功。
<!DOCTYPE html>
<html>
<head>
<script>
function call(){
var siv=document.getElementById("siv").value;
alert(siv);
}
</script>
</head>
<body>
<form name="alm" action="#" method="post" onSubmit="call();">
<label>Province: </label><br>
<select name="ProvinceDropDown" id="ProvinceDropDown">
<option value="SelectProvince"> Please Select </option>
<option value="Sindh" selected='selected'> Sindh </option>
</select>
<input type="text" value="" id="siv" name="siv">
<input type="submit" value="submit" >
</form>
</body>
</html>
答案 0 :(得分:2)
您的var siv = document.getElementById("siv").value;
声明中有一些不常见的字符(除非您的编辑通知您,否则无法看到)。再次写(删除那些不常见的字符),你的代码就可以了。
function call() {
var siv = document.getElementById("siv").value;
alert(siv);
}
&#13;
<form name="alm" action="#" method="post" onSubmit="call();">
<label>Province:</label>
<br>
<select name="ProvinceDropDown" id="ProvinceDropDown">
<option value="SelectProvince">Please Select</option>
<option value="Sindh" selected='selected'>Sindh</option>
</select>
<input type="text" value="" id="siv" name="siv">
<input type="submit" value="submit">
</form>
&#13;
答案 1 :(得分:2)
检查document.getElementById(&#34; id&#34;)。value;拼写。
答案 2 :(得分:2)
您的JavaScript代码有\ u200b(零宽度空间)
更新代码:
<!DOCTYPE html>
<html>
<head>
<title>Stack Sample</title>
</head>
<script type="text/javascript">
function call() {
var siv = document.getElementById("siv").value;
alert(siv);
}
</script>
<body>
<form name="alm" action="#" method="post" onSubmit="call();">
<label>Province:</label>
<br>
<select name="ProvinceDropDown" id="ProvinceDropDown">
<option value="SelectProvince">Please Select</option>
<option value="Sindh" selected='selected'>Sindh</option>
</select>
<input type="text" value="" id="siv" name="siv">
<input type="submit" value="submit">
</form>
</body>
</html>