function toggle_tab(t) {
	var x = (t*-30) + 30;
	var ele = document.getElementById("register_tab");
	ele.style.backgroundPosition = "0 "+x+"px";
	var tab_txt = document.getElementById("tab_text");
	var new_txt = document.getElementById("tab_text_"+t);
	tab_txt.innerHTML = new_txt.innerHTML;
  switch (t) {
     case  1: document.getElementById('tab_other_text').innerHTML='<h4><a href=\"http://www.conexsysregistration.com/expocycle07\">Exhibitors, Register Now!</a></h4>';
break;
     case  2: document.getElementById('tab_other_text').innerHTML='<h4><a href=\"http://www.conexsysonline.com/btac/default.asp\">Attendees, Register Now!</a></h4>';
break;
     case  3: document.getElementById('tab_other_text').innerHTML='<h4><a href=\"http://anotherpage.com\">Media, Register Now!</a></h4>';
break;




    }
}