function validate_login()
{	

		if(document.loginfrm.username.value=="")
		{
			alert("Please enter your username");
			document.loginfrm.username.focus();
			return false;
		}	
	
		
	if(document.loginfrm.password.value=="")
		{
			alert("Please enter your password");
			document.loginfrm.password.focus();
			return false;
		}	
	
	
		return true;	
}