不是高手也可以进，up也有分。

Question

<table id="tt" border=1>
<tr><td><input name="starttime" value=1></td><td><input name="endtime" value=2></td></tr>
<tr><td><input name="starttime" value=2></td><td><input name="endtime" value=1></td></tr>
<tr><td><input name="starttime" value=1></td><td><input name="endtime" value=1></td></tr>
</table>
<SCRIPT LANGUAGE="JavaScript">
for(i=0;i<document.all.starttime.length;i++){
 if(document.all.starttime[i].value>document.all.endtime[i].value){
  alert("开始时间不能小于结束时间。在第"+(i+1)+"行");
 }
}
</SCRIPT>

Answer 1

校验时间function checktime(ctime)
{
if (ctime.length == 0) return true; var re=/^(([0-9]|[01][0-9]|2[0-3])(:([0-9]|[0-5][0-9])){0,2}|(0?[0-9]|1[0-1])(:([0-9]|[0-5][0-9])){0,2})?$/;
return re.test(ctime);
}
alert(checktime("24:30"));
alert(checktime("22:30"));
alert(checktime("02:30"));

Answer 2

比较时间function comptime(t1,t2){
var ar1 = t1.split(":");
var ar2 = t2.split(":");
if ( parseInt(ar2[0])>parseInt(ar1[0]) ) { return true;}
if ( parseInt(ar2[0])==parseInt(ar1[0]) && parseInt(ar2[1])>parseInt(ar1[1]) ) { return true;}
return false;
}alert(comptime("20:30","22:12"));
alert(comptime("22:30","22:12"));
alert(comptime("08:30","08:30"));

Answer 3

<script>function comptime(t1,t2){
var ar1 = new Date(t1);
var ar2 = new Date(t2);
return ar1<ar2
}alert(comptime("2002/11/12 20:30","2002/11/12 22:12"));
alert(comptime("2002/11/12 22:30","2002/11/12 22:12"));
alert(comptime("2002/11/12 08:30","2002/11/12 08:30"));
</script>

Answer 4

/\d{4}[/|-|\.]\d{1,2}[/|-|\.]\d{1,2}/.test(dateString)