页面获取的时间在js中的比较

function doAction(actType)
{
if(!checkForm())
{
return;
}
var fatherdate1="<%=taskP.getCreateDate() %>";
var fatherdate2="<%=taskP.getDeadDate() %>";
var sondate=f1.deadDate.value;
if(compareDate(fatherdate2,sondate)){
alert("子任务结束时间要小于父任务结束时间");
f1.deadDate.value="";
return;
}
if(compareDate(sondate,fatherdate1)){
alert("子任务结束时间要大于父任务开始时间");
f1.deadDate.value="";
return;
}
f1.command.value=actType;
f1.submit();
}
function compareDate(a,b) {//a 早于b ,return true
var strdt1=a.replace("-","/");
var strdt2=b.replace("-","/");
var dt1=new Date(Date.parse(strdt1));
var dt2=new Date(Date.parse(strdt2));
if(dt1<dt2){
return true;
}else{
return false;
}
}

f1:form的name

actType:action的url