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();

}

}