$(function(){
				$("#login").submit(function(){
  					var username=escape($("#username").val());
  					var passwrod=escape($("#password").val());
  					if (username == "")
  					{
  						dialog("信息提示","text:用户名不能为空！","200px","auto","form");
  						return false;
  					}
  					else if (passwrod == "")
  					{
  						dialog("信息提示","text:密码不能为空！","200px","auto","form");
  						return false;
  					}
				});
				
				$("#Reg").click(function(){
				  	dialog("用户注册","url:get?Reg.asp","400px","auto","text");
				});
			});