function isValidLogin()
{
	if(Trim(document.frmcustlogin.vUsername.value)=="")
	{
		alert("Please Enter User Name");
		document.frmcustlogin.vUsername.focus();
		return false;
	}
	if(Trim(document.frmcustlogin.vPassword.value)=="")
	{
		alert("Please Enter Password");
		document.frmcustlogin.vPassword.focus();
		return false;
	}
	return true;
}