function showChatButton(workgroup) 
{
	var d = new Date();
	var v1 = d.getSeconds() + '' + d.getDay();
	var img = 'http://intranet.sel-imperial.co.uk:9090/webchat/live?action=isAvailable&workgroup=' + workgroup;
	var gotoURL = 'http://intranet.sel-imperial.co.uk:9090/webchat/start.jsp?workgroup=' + workgroup + '&location=' + window.location.href;

	var winLeft = (screen.width - 500) / 2;
  	var winUp = (screen.height - 400) / 2;
	var optString = "location=no,status=no,toolbar=no,personalbar=no,menubar=no,directories=no,scrollbars=no,resizable=yes,width=500,height=400,left="+winLeft+",top="+winUp

	document.write("<a href='"+gotoURL+"' onclick='window.open(\"http://intranet.sel-imperial.co.uk:9090/webchat/start.jsp?workgroup=" + workgroup + "&amp;location=" + window.location.href+"\", \"framemain\", \"" + optString + "\"); return false;'><img src='" + img +"' border='0'></a>");
				
}