<html>
<head>
</head>
<body>
<form name="myForm" action="demo_form.jsp" onsubmit="return validateForm()" method="post">
First name: <input type="text" name="fname">
Email address: <input type="text" name="email">
<input type="submit" value="Submit">
</form>
<script>
function validateForm()
{
var x=document.forms["myForm"]["fname"].value;
if (x==null || x=="")
{ alert("First name must be filled out");
return false;
}
var x=document.forms["myForm"]["email"].value;
var atpos=x.indexOf("@");
var dotpos=x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
{ alert("Not a valid e-mail address");
return false;
}
}
</script>
</body>
</html>
<head>
</head>
<body>
<form name="myForm" action="demo_form.jsp" onsubmit="return validateForm()" method="post">
First name: <input type="text" name="fname">
Email address: <input type="text" name="email">
<input type="submit" value="Submit">
</form>
<script>
function validateForm()
{
var x=document.forms["myForm"]["fname"].value;
if (x==null || x=="")
{ alert("First name must be filled out");
return false;
}
var x=document.forms["myForm"]["email"].value;
var atpos=x.indexOf("@");
var dotpos=x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
{ alert("Not a valid e-mail address");
return false;
}
}
</script>
</body>
</html>
Post a Comment