help replace className with idName in this code

how can i replace the .className with an id name. the current .className uses defined classes in css but in my new css I am using ids that start with #. how can i incoporate those id names in the javascript below. thank you for your help.

[CODE]<script type=”text/javascript”>

function tabs(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+’ current’;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}tabs(autochangemenu,currenttab);restart_autochange();}}function restart_autochange(){clearTimeout(timer);counter=0;start_autochange();}function stop_autochange(){clearTimeout(timer);counter=0;}

window.onload=function(){
var menucount=loadtabs.length; var a = 0; var b = 1; do {tabs(b, loadtabs[a]); a++; b++;}while (b<=menucount);
if (autochangemenu!=0){start_autochange();}
}
</script>[/CODE]

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