<li id="current">1</li>
<li >2</li>
<li >3</li><script>
document.onclick = ck;
function ck(ev)
{
ev = window.event || ev;
ev.srcElement.setAttribute('id','current');
alert('id='+ev.srcElement.id);
}
</script>
<li >2</li>
<li >3</li><script>
document.onclick = ck;
function ck(ev)
{
ev = window.event || ev;
ev.srcElement.setAttribute('id','current');
alert('id='+ev.srcElement.id);
}
</script>
<!--
function fif(ob)
{
var ob_f = document.getElementById("current").id = "";
ob.id = "current";
}
//-->
</SCRIPT>
</HEAD>
<BODY>
<li id="current" onclick="fif(this)">1</li>
<li id="" onclick="fif(this)">2</li>
<li id="" onclick="fif(this)">3</li><input type="button" onclick="alert(document.getElementById('current').innerText)" value="a">
</BODY>
</HTML>