js常用方法：

//测试  

var str = "\/Date(1313572554031)\/";

alert(ParseDateStr(str));

//方法

function ParseDateStr(str) {
if (str && str.length==0) {
return "";
}
try {
//把/删除，并转换为正确的javascript时间
var time = eval(‘new ‘ + (str.replace(/\//g, ‘‘)));
//格式化成字符串
var timeStr = time.getFullYear() + "-" + (time.getMonth() + 1) + "-" + time.getDate() + " " + time.getHours() + ":" + time.getMinutes() + ":" + time.getSeconds();
return timeStr;
} catch (e) {
return "";
} 
}