var dataObj=eval("("+res+")");
alert(dataObj.billBuy)
//res是如下的数据
{"billBuy":"1001BRNO1102160002","stkid":"","timeBk":"","timeBuy":"","typeBuy":"","value":"60","valueBk":"0","valueLeft":"60","wayBk":""}
原文：http://www.cnblogs.com/toSeeMyDream/p/5575362.html