javascript比较两个日期的先后示例代码

function checkDate(){
//replace(/\-/g, "\/")是根据验证表达式把日期转化成长日期格式

 var sDate = new Date(document.getElementById_x("datetimepickerStart").value.replace(/\-/g, "\/"));

    var eDate = new Date(document.getElementById_x("datetimepickerEnd").value.replace(/\-/g, "\/"));
    if(sDate > eDate)

    {

     alert("结束日期不得小于开始日期！");

     return false;

    }

    return true;

}