js时间比较

function timeCompare(){
	this.startTime=new Date(2013,1,3,0,0,0);
	this.endTime=new Date(2013,1,3,23,59,59);
}
timeCompare.prototype.init=function(){
	var start=this.startTime.getTime(),
		end=this.endTime.getTime(),
		now=new Date().getTime();
	if(now<start){
		alert("活动未开始");
	}else if(now>end){
		alert("活动已结束");
	}else{
		alert("活动进行中")
	}
}


var bb=new timeCompare();
bb.startTime=new Date(2013,1,1,0,0,0);
bb.endTime=new Date(2013,1,2,23,59,59);
bb.init();