ช่วยด้วยค่ะ document.getElementById(...)' is null or not an object

01.<script type="text/javascript">

02.<!--

03./*

04.EASY TABS 1.2 Produced and Copyright by Koller Juergen

05.www.kollermedia.at | www.austria-media.at

06.Need Help? http:/www.kollermedia.at/archive/2007/07/10/easy-tabs-12-now-with-autochange

07.You can use this Script for private and commercial Projects, but just leave the two credit lines, thank you.

08.*/

09.

10.//EASY TABS 1.2 - MENU SETTINGS

11.//Set the id names of your tablinks (without a number at the end)

12.var tablink_idname = new Array("tablink","anotherlink", "linkthree")

13.//Set the id names of your tabcontentareas (without a number at the end)

14.var tabcontent_idname = new Array("tabcontent","anothercontent", "contentthree")

15.//Set the number of your tabs in each menu

16.var tabcount = new Array("6","6","3")

17.

//Set the Tabs wich should load at start (In this Example:Menu 1 -> Tab 2 visible on load, Menu 2 -> Tab 5 visible on load , Menu 3 -> Tab 1 visible on load)

18.var loadtabs = new Array("<?=$ty?>","5","1")

19.//Set the Number of the Menu which should autochange (if you dont't want to have a change menu set it to 0)

20.var autochangemenu = 1;

21.//the speed in seconds when the tabs should change

22.var changespeed = 2;

23.//should the autochange stop if the user hover over a tab from the autochangemenu? 0=no 1=yes

24.var stoponhover = 1;

25.//END MENU SETTINGS

26.

27.

28./*Swich EasyTabs Functions - no need to edit something here*/

29.function easytabs(menunr, active) {if (menunr == autochangemenu){currenttab=active;}if ((menunr == autochangemenu)&&(stoponhover==1)) {stop_autochange()} else if ((menunr == autochangemenu)&&(stoponhover==0)) {counter=0;} menunr = menunr-1;for (i=1; i <= tabcount[menunr]; i++){document.getElementById(tablink_idname[menunr]+i).className='tab'+i;document.getElementById(tabcontent_idname[menunr]+i).style.display = 'none';}document.getElementById(tablink_idname[menunr]+active).className='tab'+active+' tabactive';document.getElementById(tabcontent_idname[menunr]+active).style.display = 'block';}var timer; counter=0; var totaltabs=tabcount[autochangemenu-1];var currenttab=loadtabs[autochangemenu-1];function start_autochange(){counter=counter+1;timer=setTimeout("start_autochange()",1000);if (counter == changespeed+1) {currenttab++;if (currenttab>totaltabs) {currenttab=1}easytabs(autochangemenu,currenttab);restart_autochange();}}function restart_autochange(){clearTimeout(timer);counter=0;start_autochange();}function stop_autochange(){clearTimeout(timer);counter=0;}

30.

31.window.onload=function(){

32.var menucount=loadtabs.length; var a = 0; var b = 1; do {easytabs(b, loadtabs[a]); a++; b++;}while (b<=menucount);

33.if (autochangemenu!=0){start_autochange();}

34.}

35.

36.function MM_jumpMenu(targ,selObj,restore){ //v3.0

37. eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");

38. if (restore) selObj.selectedIndex=0;

39.}

40.//-->

41.</script>