function login_check(){
	var username=document.getElementById("modlgn_username").value;
	
	var pwd=document.getElementById("modlgn_passwd").value;
	

	if(username==""){	
		alert("請輸入您的名稱！");
		return false;
	}if(pwd==""){	
		alert("請輸入您的密碼！");
		return false;
	}
	var url="/modules/mod_login/tmpl/check_userName.php?username="+username+"&password="+pwd;
	
	new Ajax.Request(url,{onComplete:function(request){
		
		var parser=new XmlNodeParser(request.responseXML);	
		var msg=parser.parse("msg");   
		if(msg=="N"){
			alert('用戶名或密碼不正確！');
			return false;
		}
		


		if(msg=="Y"){
		
			document.forms['login'].submit();
		}
				
		ajaxEnds();
	}});


}