function swap(name,cursel,n,idname)
{
	for(i=1;i<=n;i++)
	   {
	      var menu=document.getElementById(name+i);
	      var con=document.getElementById(idname+name+"_"+i);
	      menu.className=i==cursel?"hover":"";
	      con.style.display=i==cursel?"block":"none";
	    }
}



	function CheckForm()
	{
		if(document.UserLogin.UserName.value=="")
		{
			alert("请输入用户名！");
			document.UserLogin.UserName.focus();
			return false;
		}
		if(document.UserLogin.Password.value == "")
		{
			alert("请输入密码！");
			document.UserLogin.Password.focus();
			return false;
		}
	}