<html>
<script>
function emailvalidation()
{
var x=document.myform.email.value;
var aposition=x.indexOf("@");
var dposition=x.lastIndexOf(".");
if (aposition<1 || dposition<atposition+2 || dposition+2>=x.length){
alert("Please enter a valid e-mail address \n apostion:"+aposition+"\n dposition:"+dposition);
return false;
}
}
</script>
<body>
<form name="myform" method="post" action="C:\Users\tejas\OneDrive\Desktop\newprogram\email_valild.html" onsubmit="return emailvalidation()">
Email: <input type="text" name="email"><br/>
<input type="submit" value="register">
</form>
</body>
</html>
output
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