| Username Validation Using javaScript
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Username validation:
Example
<html>
<head>
<script type="text/javascript">
function validation()
{
var a = document.form.name.value;
if(a=="")
{
alert("Please Enter Your Name");
document.form.name.focus();
return false;
}
}
</script>
</head>
<body>
<form name="form" method="post" onsubmit="return validation()">
<tr>
<td> Your Name:</td>
<td><input type="text" name="name""></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="sub" value="Submit"></td>
</tr>
</form>
</body>
</html>
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The Output is Shown Here:
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Username Validation allows only Characters.
Example
<html>
<head>
<script type="text/javascript">
function validation()
{
var a = document.form.name.value;
if(a=="")
{
alert("Please Enter Your Name");
document.form.name.focus();
return false;
}
if(!isNaN(a))
{
alert("Please Enter Only Characters");
document.form.name.select();
return false;
}
}
</script>
</head>
<body>
<form name="form" method="post" onsubmit="return validation()">
<tr>
<td> Your Name:</td>
<td><input type="text" name="name""></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="sub" value="Submit"></td>
</tr>
</form>
</body>
</html>
|
|
|
The Output is Shown Here:
|
Username Validation allows only Limited Characters.
Example
<html>
<head>
<script type="text/javascript">
function validation()
{
var a = document.form.name.value;
if(a=="")
{
alert("Please Enter Your Name");
document.form.name.focus();
return false;
}
if(!isNaN(a))
{
alert("Please Enter Only Characters");
document.form.name.select();
return false;
}
if ((a.length < 5) || (a.length > 15))
{
alert("Your Character must be 5 to 15 Character");
document.form.name.select();
return false;
}
}
</script>
</head>
<body>
<form name="form" method="post" onsubmit="return validation()">
<tr>
<td> Your Name:</td>
<td><input type="text" name="name""></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="sub" value="Submit"></td>
</tr>
</form>
</body>
</html>
|
|
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The Output is Shown Here:
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