javascript将字符串类型转换成日期进行比较

第一种适用于：20100823这种字符串格式

function dateValid(){
    var bd = document.getElementById("sStartSaveDate").value;
    var beginDate =  new Date(bd.replace(/^(\d{4})(\d{2})(\d{2})$/,"$1/$2/$3"));
    
    var ed = document.getElementById("sEndSaveDate").value;
    var endDate = new Date(ed.replace(/^(\d{4})(\d{2})(\d{2})$/,"$1/$2/$3"));
    
    if(beginDate >= endDate){
        alert("结束时间必须大于开始时间！");
        return false;
    }else{
        document.getElementById('searchform').submit(); 
    }
}

第二种适用于：2010-08-23这种字符串格式

function dateValid(){
    var beginDate =  new Date(document.getElementById("sStartSaveDate").value.replace(/-/g,"/"));
    var endDate = new Date(document.getElementById("sEndSaveDate").value.replace(/-/g,"/"));
    if(beginDate >= endDate){
        alert("结束时间必须大于开始时间！");
        return false;
    }else{
     document.getElementById('searchform').submit();
}

第三种适用于：2010/08/23这种字符串格式

function dateValid(){
    var beginDate =  new Date(document.getElementById("sStartSaveDate").value);
    var endDate = new Date(document.getElementById("sEndSaveDate").value);
    if(beginDate >= endDate){
        alert("结束时间必须大于开始时间！");
        return false;
    }else{
     document.getElementById('searchform').submit();
}
}

转载于:https://my.oschina.net/vsxp/blog/137017