// JScript 文件


                         
    function addLoadEvent(func){
    var ondonload=window.onload;
    if(typeof window.onload!='function'){
        window.onload=func;
    }else{
        window.onload=function() {
            ondonload();
            func();
        }
    }
}                      
            
    
    function ht() {
	        var banner = document.getElementById("banner");
	        var lnks = banner.getElementsByTagName("a");
	        for(var i=0; i<lnks.length; i++) {
		        lnks[i].onmouseover = function() {
		        changePic(this);
		    }
	    }
    }
        function changePic(which) {
		    var pic = document.getElementById("banner_pic");
		    var href = which.getAttribute("href");
		    pic.setAttribute("src",href);	
    }
    

     function  nav() {
            var nav = document.getElementById("nav");
            
            var lis = nav.getElementsByTagName("li");
            var dls = nav.getElementsByTagName("dl");
            for(var i=0; i<lis.length; i++) {
                lis[i].i = i; 
                lis[i].onmouseover = function() {
                    for(var j=0; j<dls.length; j++) {
                        if(j == this.i -1) {
                            dls[j].style.display = "block";
                            }
                        else {
                            dls[j].style.display = "none";
                            }
                     } 
                }     
                document.body.onclick = function() {
                for(var j=0; j<dls.length; j++) {
                    dls[j].style.display = "none";
                    }
             }        
             
          }
     }
     

 function closeAd() {
    var fixedad = document.getElementById("fixedad");
    var close_ad = document.getElementById("close_ad");
    close_ad.onclick = function() {
        fixedad.style.display = "none";
        }
    }    
    

addLoadEvent(nav);
addLoadEvent(ht);    
addLoadEvent(closeAd);