Code:
<html>
	<head>
		<script type="text/javascript">
		function validate()
		{
			namein=document.forms[0].name1.value
			indexin=document.forms[0].email.value.indexOf('@')
			passin=document.forms[0].passin.value
			passin1=document.forms[0].passin1.value
				if(namein.length==0)
				{
					alert("Invalid name,plz re-enter")
				}
				if(indexin==-1)
				{
					alert("The Email ID entered by you is invalid")
					return false
				}
				if(passin.length<8)
				{
					alert("Too short password,plz re-enter")
					return false
				}
				if(passin!=passin1)
				{
					alert("Password mismatch")
					return false
				}
				return true
				
		}
		</script>
	</head>
	<body bgcolor="cyan">
	<center><font color="redgreenblue"><h2>VALIDATION FORM</h2></center><br><br>
	<form name="resume" onsubmit="return validate()">
	<center><table>
	<tr><td>ENTER YOUR FIRST NAME:</td>
	<td><input type="text" name="name1" maxlength=100></td></tr>
	<tr><td>ENTER YOUR EMAIL-ID:</td>
	<td><input type="text" name="email" maxlength=100></td></tr>
	<tr><td>ENTER YOUR PASSWORD:</td>
	<td><input type="password" name="passin" maxlength=30></td></tr>
	<tr><td>RETYPE YOUR PASSWORD:</td>
	<td><input type="password" name="passin1" maxlength=30></td></tr>
	</table></center><br><br><br><br><br><br><br>
	<center><input type="submit" value="proceed"></center>
	</form>
	</body>
</html>