<html>
<body>
<form name="FRM1">
Enter name
<input type="text" name="t1"><br><br>
Enter Address<br>
<textarea name="t2" placeholder="PERMANENT ADDRESS"></textarea><br><br>
Enter Telephone Number
<input type="tel" name="t3" maxlength="10"><br><br>
Enter Email Address
<input type="email" name="t4" pattern="[A-Z a-z]{5}-[@]{1}-[.]{1}" placeholder="deeshank37@gmail.com"><br><br>
<input type="button" name="b1" value="Submit" onClick="chk()">
</form>
<script type="text/javascript">
function chk() {
var x = document.forms["FRM1"]["t4"].value;
var atpos = x.indexOf("@");
var lastat = x.lastIndexOf("@");
var firstdot = x.indexOf(".");
var dotpos = x.lastIndexOf(".");
if (atpos < 1 || dotpos < atpos + 2 || dotpos + 2 >= x.length || firstdot < atpos || atpos < lastat) {
alert("Not a valid email address");
document.forms["FRM1"]["t4"].focus();
} else {
alert("Form submitted successfully");
return true;
}
}
</script>
</body>
</html>
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