js页面时间比较

var dateStart=$("#surveyDateStart").val();

var dateEnd=$("#surveyDateEnd").val();

if(dateStart !=""&&dateEnd!=""){

   var start=validDateStart.split('-');
    var end =validDateEnd.split('-');
    var startDate =new Date(start[0],parseInt(start[1]-1),start[2]);
    var endDate=new Date(end[0],parseInt(end[1]-1),end[2]);

    if(startDate>endDate){

        alert("开始时间大");

    }

}