28 July 2008

Validation from JavaScript before Form Submit

Look at the attribute of form tag onsubmit="return validate();".

<html>
<
head>
<
title>Validate before submittitle>
<script language=javascript>
function validate()
{
var v = document.getElementById("SearchString").value;
if(v.length == 0)
{
alert("No input given");
return false;
}
return true;
}

script>
head>

<body>

<form name="myform" action="http://www.google.com/search" method="GET" onsubmit="return validate();">

Search String: <input type="text" id="SearchString" size="25" value="" name="q">
<br> <input type="submit" value="Search in Google"><br>
div>
form>
body>
html>

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