js设置30分钟后展示

<script>

Date.prototype.format = function(format){

var o = {

"M+" : this.getMonth()+1, //month

"d+" : this.getDate(), //day

"h+" : this.getHours(), //hour

"m+" : this.getMinutes(), //minute

"s+" : this.getSeconds(), //second

"q+" : Math.floor((this.getMonth()+3)/3), //quarter

"S" : this.getMilliseconds() //millisecond

}

if(/(y+)/.test(format)) {

format = format.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));

}

for(var k in o) {

if(new RegExp("("+ k +")").test(format)) {

format = format.replace(RegExp.$1, RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));

}

}

return format;

}

 var x = "2010-09-28 14:50:26"; // 取得的TextBox中的时间

var replaceStr = "-";

var desStr=x.replace(new RegExp(replaceStr,'gm'),'/');

//alert(desStr);

 var time = new Date(desStr);

 var b = 30; //分钟数后

 time.setMinutes(time.getMinutes() + b, time.getSeconds(), 0);

 alert(time);

var time2 = time.format("yyyy-MM-dd hh:mm:ss");

alert(time2);

</script>