function textLayer(layer){
	var strTag = 'div';
	for (i=0;i<document.getElementsByTagName(strTag).length; i++) {
		if (document.getElementsByTagName(strTag).item(i).className == 'textLayer') {
		document.getElementsByTagName(strTag).item(i).style.display="none";
		}		
	}
	document.getElementById(layer).style.display="block";	
}

function centeredPopup(mypage, myname, w, h, scroll) {
   var winl = (screen.width - w) / 2;
   var wint = (screen.height - h) / 2;
   winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
   win = window.open(mypage, myname, winprops)
   if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

// envoke the above popup function with (example: <a href="staffCounseling.html" onclick="centeredPopup(this.href,'staff','700','500','yes');return false;">