javascript 中绑定事件监听的函数【支持数组对象绑定】

var addEventHandler=function(obj, type, func) {
		if(!obj){return;}
		var doOn=function(o){
			if(o.addEventListener){o.addEventListener(type, func, false);}
			else if(o.attachEvent){o.attachEvent("on" + type, func);}
			else{o["on" + type] = func;}
		}
		var IsArray=function(v){ 
			try{ 
				var a = v[0]; 
				return typeof(a) != "undefined"; 
			}catch(e){ 
				return false; 
			} 
		}
		if(obj.tagName!='SELECT'&&IsArray(obj)){
			for(var i=0,oLen=obj.length;i<oLen;i++){
				doOn(obj[i],type.func);
			}
		}else{
			doOn(obj);
		}
};