 
<!--
function form_Validator(theForm)
{

var alertsay = "";   

if (theForm.txtUserName.value == "")
{
alert("Please enter a username");
theForm.txtUserName.focus();
return (false);
}
 
if (theForm.txtPassword.value == "")
{
alert("Please enter a password");
theForm.txtPassword.focus();
return (false);
}

 return (true);
 }