function bind(el,eventType,callback){
if(typeof el.addEventListener === 'function'){
el.addEventListener(el,eventType,callback, false);
}else if(typeof el.attechEvent === 'function'){
el.attachEvent('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 = target.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();
求老师指点
李晓健
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