DOM基础练习代码（二）

 1   Element.prototype.getChildren() {
 2         var child = this.childNodes,
 3               len = child.length,
 4         obj = {
 5               ‘length’: 0,
 6               ‘push’: Array.prototype.push
 7         }
 8         for(var i = 0; i < len; i++){
 9               if(child[i].nodeType === 1) {
10                     obj.push(child[i]);
11               }
12         }
13         return obj;
14   }   

 1   Element.prototype.hasChildren = function () {
 2         var child = this.childNodes,
 3               len = child.length;
 4         for( var i = 0; i < len; i++){
 5               if(child[i].nodeType == 1) {
 6                     return true;
 7               }
 8         }
 9         return false;
10   }