function validate_form(){
			var loginname=document.getElementById('login_name').value;
			var password=document.getElementById('password').value;
			
			if(loginname=="User Name"){
				alert("User name cannot be left blank");
				document.getElementById('login_name').focus();
				return false;
			}
			
			if(password==""){
				alert("Password cannot be left blank");
				document.getElementById('password').focus();
				return false;
			}
			
			return true;
		}