json转为JS二维数组

var str=[
			{id:"1",name:"张三",age:12},
			{id:"2",name:"李四",age:34},
			{id:"3",name:"王五",age:38},
			{id:"4",name:"赵六",age:40},
			{id:"5",name:"使命召唤",age:20},
			{id:"6",name:"黑色行动",age:32}
		];
		var l=str.length;
		var itemArray = new Array();
		for(var i=0;i<l;i++){
			window["itemsObj"+(i+1)]=new Object();
			for(var key in str[i]){
				window["itemsObj"+(i+1)][key]=str[i][key];
			}
			itemArray[i]=window["itemsObj"+(i+1)];
		}