function currenttab(xx) {

if (document.getElementById) {

var outsideiframe = frames['pageheader'];
var relevantlistitem = outsideiframe.window.document.getElementById(xx);
var relevantlist = outsideiframe.window.document.getElementById("ul1");

	for (i=0; i<relevantlist.childNodes.length; i++) {
	nnode = relevantlist.childNodes[i];	
		if (nnode.nodeName=="LI") {		
		if (nnode.className=="current"){
		nnode.className=nnode.className.replace("current", "");
		  }
		}
	  }

relevantlistitem.className+=" current";

	}
}