well sandeep, java code best suits for it and Java Script is generally used for this.
A sample code is
<script>
<!--
function validate()
{
if(document.log in.us erName.value=="")
{
alert ("Please enter User Name")
return false
}
if(document.login.pa sswor d.value=="")
{
alert ("Please enter Password")
return false
}
}
//-->
</script >
<form name="login" onsubmit="return validate()">
<input type="text" size="20" name="userName">
<input type="text" size="20" name="password">
<input type="submit" name="submit" value="Submit">
</form>
To know more about it and see the entire source code , Please visit the source site :
http://www.codeproject.co m/KB/ scripting/jsbeginner.aspx
Answered by
Romi
, an ibibo Master,
at
11:29 AM on June 25, 2008