<head>
</head>
<body>
<form method="post" name="f1">
enter email id<input name="t1" size="25" type="text" /><br />
<input name="b1" onclick="em()" type="button" value="check email " />
</form>
<script langauge="javascript">
function em()
{
var str,atr,dot
str=document.f1.t1.value
atr=str.indexOf("@")
dot=str.lastIndexOf(".")
if((atr<1)||(dot<atr+2)||(dot+2>=str.length))
{
alert("email id rejected.....!!!")
document.f1.t1.value=""
document.f1.t1.focus()
return false
}
else
{
alert("email id accepted.....!!!")
return true
}
}
</script>
</body>
</html>
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