function show_subnavi(menuepunkt)
 {
 if(menuepunkt!='subnavi03') document.getElementById("subnavi03").style.visibility = "hidden";
 if(menuepunkt!='subnavi04') document.getElementById("subnavi04").style.visibility = "hidden";
 if(menuepunkt!='subnavi06') document.getElementById("subnavi06").style.visibility = "hidden";
 if(document.getElementById && menuepunkt) document.getElementById("subnavi"+menuepunkt).style.visibility = "visible";
 }

var myimages=new Array();
function preloadimages()
 {
 for (i=0;i<preloadimages.arguments.length;i++)
 {
 myimages[i]=new Image()
 myimages[i].src=preloadimages.arguments[i]
 }
 }

preloadimages("buttons/01_home_1.gif","buttons/02_mission_1.gif","buttons/03_research_1.gif","buttons/04_studies_1.gif","buttons/05_research_1.gif","buttons/06_team_1.gif","buttons/07_jobs_1.gif","buttons/08_contact_1.gif","buttons/09_disclaimer_1.gif","buttons/10_login_1.gif","buttons/03_main_research_1.gif","buttons/03_current_themes_1.gif","buttons/06_kleine_1.gif","buttons/06_venzin_1.gif");