var c2cframe = null;
  function openClickToCallFrame(userID, buttonID) {
    if(c2cframe != null) {
      if(!c2cframe.closed) {
        c2cframe.close();
      }
    }
/*
Wünschen Sie eine andere Sprache als im Call-Back-Office angegeben,
 kommentieren Sie einfach eine der nachfolgenden Zeilen ein:
(de=Deutsch, en=Englisch, fr=Französisch)*/
    c2cframe = open("http://www.konferenzportal.com:80/callback/callbackinitiation.do" + 
                    "?NEW=NEW" + 
                    "&UserID=" + userID + 
                    "&BUTTONID=" + buttonID 
              //  +  "&Locale=de"
              //  +  "&Locale=en"
              //  +  "&Locale=fr"
                   , "ClickToCallFrame", "width=275,height=420,resizable=yes,left=50,top=50");
    return false;
  }

startList = function() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("nav");
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className+=" over";
				}
				node.onmouseout=function() {
					this.className=this.className.replace(" over", "");
				}
			}
		}
	}
}
window.onload=startList;

function hover_c()
{
document.getElementById("head_menu_preview").style.display = "none";
document.getElementById("head_menu_preview_c").style.display = "block";
document.getElementById("head_menu_preview_d").style.display = "none";
document.getElementById("head_menu_preview_2").style.display = "none";
document.getElementById("head_menu_preview_v").style.display = "none";
document.getElementById("head_menu_preview_o").style.display = "none";
}
function hover_d()
{
document.getElementById("head_menu_preview").style.display = "none";
document.getElementById("head_menu_preview_c").style.display = "none";
document.getElementById("head_menu_preview_d").style.display = "block";
document.getElementById("head_menu_preview_2").style.display = "none";
document.getElementById("head_menu_preview_v").style.display = "none";
document.getElementById("head_menu_preview_o").style.display = "none";
}
function hover_2()
{
document.getElementById("head_menu_preview").style.display = "none";
document.getElementById("head_menu_preview_c").style.display = "none";
document.getElementById("head_menu_preview_d").style.display = "none";
document.getElementById("head_menu_preview_2").style.display = "block";
document.getElementById("head_menu_preview_v").style.display = "none";
document.getElementById("head_menu_preview_o").style.display = "none";
}
function hover_v()
{
document.getElementById("head_menu_preview").style.display = "none";
document.getElementById("head_menu_preview_c").style.display = "none";
document.getElementById("head_menu_preview_d").style.display = "none";
document.getElementById("head_menu_preview_2").style.display = "none";
document.getElementById("head_menu_preview_v").style.display = "block";
document.getElementById("head_menu_preview_o").style.display = "none";
}
function hover_o()
{
document.getElementById("head_menu_preview").style.display = "none";
document.getElementById("head_menu_preview_c").style.display = "none";
document.getElementById("head_menu_preview_d").style.display = "none";
document.getElementById("head_menu_preview_2").style.display = "none";
document.getElementById("head_menu_preview_v").style.display = "none";
document.getElementById("head_menu_preview_o").style.display = "block";
}

function hover_k()
{
document.getElementById("conf-sw").style.display = "none";
document.getElementById("conf-c").style.display = "none";
document.getElementById("data-c").style.display = "none";
document.getElementById("click-c").style.display = "block";
}
function hover_h()
{
document.getElementById("head_menu_preview").style.display = "block";
document.getElementById("head_menu_preview_c").style.display = "none";
document.getElementById("head_menu_preview_d").style.display = "none";
document.getElementById("head_menu_preview_2").style.display = "none";
document.getElementById("head_menu_preview_v").style.display = "none";
document.getElementById("head_menu_preview_o").style.display = "none";
}
function hover_t()
{
document.getElementById("logint").className = 't';
document.teilnehmer.action = "http://csn.konferenzstart.de/index.jsp";
document.getElementById("pas").style.display = "none";
document.getElementById("pin").style.display = "block";
document.getElementById("nutz").style.display = "none";
document.getElementById("vornn").style.display = "block";
document.getElementById("feldname").name = "name";
document.getElementById("feldpassword").name = "PIN";
}
function hover_m()
{
document.getElementById("logint").className = 'm';
document.teilnehmer.action = "https://www.konferenzportal.com/conference/login.do";
document.getElementById("pin").style.display = "none";
document.getElementById("pas").style.display = "block";
document.getElementById("vornn").style.display = "none";
document.getElementById("nutz").style.display = "block";
document.getElementById("feldname").name = "username";
document.getElementById("feldpassword").name = "password";
}