照着打的js文件却没效果出来？？
function bind(el,eventType, callback){
if(typeof el.addEventListener === "function"){
el.addEventListener(el,eventType, callback,false);
}else if(typeof el.attechEvent === "function"){
el.attechEvent("on" + eventType,callback);
}
}
function mouseoverHandler(e){
var target = e.target || e.srcElement;
var outer = document.getElementById("subject");
var list = outer.getElementsByTagName("li");
for(var i=0; i<list.length; i++){
list[i].className = "";
}
while(target.tagName != "LI" && target.tagName == "body"){
target = targt.parentNode;
}
target.className = "big";
}
function initList(){
var outer = document.getElementById("subject");
var list = outer.getElementsByTagName("li");
for(var i=0; i<list.length; i++){
bind(list[i],"mouseover", mouseoverHandler);
}
}
initList();然后HTML文件中引用就是这样子：
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <link rel="stylesheet" type="text/css" href="index.css"> <title>手风琴效果</title> <script type="text/javascript" src="index.js"></script> </head> <body> 省略…… </body> </html>
监听和缩放的效果都没有出来，为什么
