01.<html>
02.<script type="text/javascript">
03.
04.function chknull(){
05. var fileup = document.getElementById(
06. alert(fileup.value);
07.
08. for(i = 0; i < fileup.length; i++){
09. //alert(fileup.value);
10. if(fileup.value == ""){
11. alert("กรุณาเลือกรูปภาพ เพื่อทำการอัพโหลด");
12. fileup.focus();
13. return false;
14. }
15. }
16.}
17.
18.</script>
19.<body >
20.<form action="" method="post" onSubmit="JavaScript:return chknull();">
21.<input type="file" id="ID_fileUpload[]" name="ID_fileUpload[]"><br>
22.<input type="file" id="ID_fileUpload[]" name="ID_fileUpload[]"><br>
23.<input type="file" id="ID_fileUpload[]" name="ID_fileUpload[]"><br>
24.<input type="file" id="ID_fileUpload[]" name="ID_fileUpload[]"><br>
25.<input type="file" id="ID_fileUpload[]" name="ID_fileUpload[]"><br>
26.<input type="file" id="ID_fileUpload[]" name="ID_fileUpload[]"><br>
27.<input type="submit" id="submit" name="submit" value="submit">
28.
29.
30.</form>
31.</body>
32.</html>
