var angezeigt = false;
            function clear_layer(){
                document.getElementById('unavi2').style.display='none';
                document.getElementById('unavi1').style.display='none';
                document.getElementById('unavi3').style.display='none';
                document.getElementById('unavi4').style.display='none';
            }

            function show_schlagwort ( value ) {

                document.getElementById('schlagwort').style.display='inline';
                document.getElementById('schlagwort_inhalt').innerHTML = value;

            }
            function hide_schlagwort (  ) {

                document.getElementById('schlagwort').style.display='none';
                document.getElementById('schlagwort_inhalt').innerHTML = '';

            }

            function show_schlagwort2(id) {
              document.getElementById('schlagwort_inhalt').innerHTML = '';
                xmlhttpLoad('content.php?seite=seiten/wissensbasis_load_schlagwort.php&displaynone=1&navigation=0&id='+id,'schlagwort_inhalt');
                document.getElementById('schlagwort').style.display = 'block';
                angezeigt = true;
                window.setTimeout ( 'hideschlagwort()' , 5000 );
            }
            function hideschlagwort ( ) {
                document.getElementById('schlagwort').style.display = 'none';
            }
            wmtt = null;

            document.onmousemove = updateWMTT;
            e = document.getElementById( 'schlagwort' );
            function updateWMTT(e) {

                    x = (document.all) ? window.event.x + document.body.scrollLeft : e.pageX;
                    y = (document.all) ? window.event.y + document.body.scrollTop  : e.pageY;


                        document.getElementById( 'schlagwort' ).style.left = x + "px";
                        document.getElementById( 'schlagwort' ).style.top  = y  + "px";


            }

            function show_content( content , vesna ) {

                temptop = document.getElementById('schlagwort').style.left;
                leftpx = temptop.indexOf ( 'px' );
                leftpos = temptop.substr ( 0 , leftpx );
                leftpos = Number(leftpos) + 180 - vesna;
                document.getElementById('beschreibung').style.top = document.getElementById('schlagwort').style.top;
                document.getElementById('beschreibung').style.left = leftpos+"px";
            document.getElementById('beschreibung').innerHTML = content;
                document.getElementById('beschreibung').style.display = 'block';
                
                
            }

            function show_addrcontent (content , vesna ) {

                temptop = document.getElementById('schlagwort').style.left;
                leftpx = temptop.indexOf ( 'px' );
                leftpos = temptop.substr ( 0 , leftpx );
                leftpos = Number(leftpos) + 180 - vesna;
                document.getElementById('beschreibung').style.top = document.getElementById('schlagwort').style.top;
                document.getElementById('beschreibung').style.left = leftpos+"px";
            document.getElementById('beschreibung').innerHTML = content;
                document.getElementById('beschreibung').style.display = 'block';
                
                
            }
            function hideBeschreibung() {
                document.getElementById('beschreibung').style.display = 'none';
            }



            function openURL ( url ) {
                window.open(url, "_blank" )
            }