function serverMapPath(fileName){
		var syspath = location.href; 
		syspath = syspath.toLowerCase();      //把路径名称转换成小写
		myPosition = syspath.lastIndexOf("/");  // 获取文件路径中的最后一个"/"
		
		syspath = syspath.substring(0,parseInt(myPosition)+1); // 使用substring函数截取"/"之前的字符串，就得到当前目录的路径 
		
		syspath = syspath.replace("file:///","");   //这里要把file:///替换为空，否则会报错
		
		syspath = syspath.replace(new RegExp("%20","gm")," ");   // 如果文件名中含有空格，则要还原空格，替换所有的 %20 为 " "
		
//		syspath = syspath + fileName; 
		return syspath.toString();
	}


	var demopath=serverMapPath();
	if(demopath.indexOf("/v2009/1xw/") >= 0){
		$(".menu1 a").css("background-position","0 -40px");
	}//新闻的菜单只有一个
	
	if(demopath.indexOf("/v2009/2zp/") >= 0){
		$(".menu2 a").css("background-position","0 -40px");
	}
	if(demopath.indexOf("/v2009/2zp/1xx/") >= 0){
		$(".menu2 a").css("background-position","0 -40px");
		$(".menu2-1 a").css("background-position","0 -40px");
	}
	if(demopath.indexOf("/v2009/2zp/2tg/") >= 0){
		$(".menu2 a").css("background-position","0 -40px");
		$(".menu2-2 a").css("background-position","0 -40px");
	}
	if(demopath.indexOf("/v2009/2zp/3bz/") >= 0){
		$(".menu2 a").css("background-position","0 -40px");
		$(".menu2-3 a").css("background-position","0 -40px");
	}
	if(demopath.indexOf("/v2009/2zp/4wh/") >= 0){
		$(".menu2 a").css("background-position","0 -40px");
		$(".menu2-4 a").css("background-position","0 -40px");
	}//作品的子菜单有四个
	
	if(demopath.indexOf("/v2009/3gy/1gy/") >= 0){
		$(".menu4 a").css("background-position","0 -40px");
		$(".menu3-1 a").css("background-position","0 -40px");		
	}
	if(demopath.indexOf("/v2009/3gy/2gd/") >= 0){
		$(".menu4 a").css("background-position","0 -40px");
		$(".menu3-2 a").css("background-position","0 -40px");		
	}
	if(demopath.indexOf("/v2009/3gy/3fw/") >= 0){
		$(".menu4 a").css("background-position","0 -40px");
		$(".menu3-3 a").css("background-position","0 -40px");		
	}//关于我们的子菜单有三个
	
	if(demopath.indexOf("/v2009/4lx/") >= 0){
		$(".menu5 a").css("background-position","0 -40px");
	}//联系的菜单只有一个