PROGRAM IN JAVACSRIPT FOR VALIDATION OF A FORM

<html>
<head>
<script type="text/javascript">
function sub()
{
if(document.getElementById("t1").value == "")
alert("Please enter your name");
else if(document.getElementById("t2").value == "")
alert("Please enter a password");
else if(document.getElementById("t2").value != document.getElementById("t3").value)
alert("Please enter correct password");
else if(document.getElementById("t4").value == "")
alert("Please enter your address");
else
alert("Form has been submitted");
}
</script>
</head>
<body>
<form>
<p align="center">
User Name:<input type="text" id="t1"><br><br>
Password:<input type="text" id="t2"><br><br>
Confirm Password:<input type="text" id="t3"><br><br>
Address:<textarea rows="2" cols="25" id="t4"></textarea><br><br>
<input type="button" value="Submit" onclick="sub()">
<input type="reset" value="Clear All">
</p>
</form>
</body>
</html>

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