Javascript onclick show/hide div tag!

Hellow!
I have script from experts-exchange:

<script type="text/javascript">
 var prevSelect=0;
function showDivSelect(divID) {
        if(document.getElementById(divID))
        {
                if( prevSelect && prevSelect != divID)
                        toggle(prevSelect);
                document.getElementById(divID).style.display = 'block';
                prevSelect = divID;
        }
}
function toggle(divID) {
document.getElementById(divID).style.display = (document.getElementById(divID).style.display=='none'?'block':"none");
}
</script>

<table width="500" ><tr><td  valign="top" width="250"><input type="hidden" name="advanced_payments" value="1" style="width: 20px" onClick="toggle('a')">
<div id="a">


<select  style="border:none; width:150px; " id="" size="20"  name="advanced_payment_type" onchange="showDivSelect(this.value);">
<option value="1">option1</option>
<option value="2">option2</option>
<option value="3">option3</option>
</select>

</td><td width="250" valign="top">
<div id="1" style="display:none">
<div id="2" style="display:none">
<div id="3" style="display:none">
</div>
</div>


Script works fine.. but I need something other.. not listobx but simple <a href="#" onclick="changeDIV">

cam somebody HELP me?!

Tnx..

P.S. sorry for my English!Start Free Trial