function isNumberString (InString)  {
		if(InString.length==0) return (false);
		var RefString="1234567890";
		for (Count=0; Count < InString.length; Count++)  {
			TempChar= InString.substring (Count, Count+1);
			if (RefString.indexOf (TempChar, 0)==-1)  
			return (false);
		}
		return (true);
	}

	function getObjectRef(objName, doc) {
		var obj;
		var i;
		var ix;
		
	 	if (!doc) doc=document;
		
		if ( (ix=objName.indexOf("?")) > 0 && parent.frames.length) {
			doc = parent.frames[objName.substring(ix+1)].document;
			objName = objName.substring(0,ix);
		}
		
		if (!(obj=doc[objName]) && doc.all)
			obj = doc.all[objName];
		
		for (i=0; !obj && i<doc.forms.length; i++)
			obj = doc.forms[i][objName];
		
		for (i=0; !obj && doc.layers && i<doc.layers.length; i++)
			obj = getObjectRef(objName, doc.layers[i].document);
		
		if (!obj && document.getElementById)
			obj = document.getElementById(objName);
		
		return obj;
	}

	function showCount(field) {
		var obj;
		obj = getObjectRef(field, document);
		
		var l;
		var aantal;
		aantal = 0;
		for (l=0;l<obj.length;l++) {
			if (obj.options(l).selected == true) {
				aantal ++;
			}
		}
		
		var oTxt;
		oTxt = getObjectRef(field+'_count', document);
		var strSelected = oTxt.innerText;
		strSelected = strSelected.substring(strSelected.indexOf(' '));
		oTxt.innerHTML = aantal.toString() + strSelected;
	}

	function setHeaders(header, subheader) {
		if (top.bars.document.isLoaded) {
			top.bars.document.all.item('titel').innerText = header;
			top.bars.document.all.item('subtitel').innerText = subheader;
		} else {
			setTimeout('setHeaders(\'' + header + '\', \'' + subheader + '\')',500);
		}
	}