<Script Language="Javascript">
function aa()
{
//function body
}
</Script>
<html>
<body>
<input type="button" onDblClick="aa()">
</body>
</html>
function aa()
{
//function body
}
</Script>
<html>
<body>
<input type="button" onDblClick="aa()">
</body>
</html>