var ie4 = (document.all && !document.getElementById) ? true : false;
var ns4 = (document.layers) ? true : false;
var ie5 = (document.all && document.getElementById) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;


function layerWrite(id,nestref,text) {
        if (ns4) {
                if (nestref) var lyr = eval('document.'+nestref+'.document.'+id+'.document')
                else var lyr = document.layers[id].document
                lyr.open()
                lyr.write(text)
                lyr.close()
        }
	else if (ie4 || ie5) document.all[id].innerHTML = text;
        else if (ns6) document.getElementById(id).innerHTML = text;
        }

 
 link = new Array()
      link[0] = new Array('link0Div','ueber.htm#anker1','Überblick',true,true)
      link[1] = new Array('link1Div','prob.htm#anker1','Problemstellung',false,true)
      link[2] = new Array('link2Div','loes.htm#anker1','Lösung',true,true)
      link[3] = new Array('link3Div','anw.htm#anker1','Anwendung',false,true)
      function linkOver(num) {
        for (var i=0;i<link.length;i++) 
        	{
                        if (link[i][3]==true) linkOut(i)
                }
        link[num][3] = true
        if (link[num][4]==true)
        layerWrite(link[num][0],null,'<img WIDTH=18 HEIGHT=18 ALIGN=left BORDER=0 VSPACE=0 HSPACE=0 src=pics/menu_ordner_auf.gif><A CLASS="rot" HREF="'+link[num][1]+'"  target=unten>'+link[num][2]+'</A>')
        else
         layerWrite(link[num][0],null,'<img WIDTH=18 HEIGHT=18 ALIGN=left BORDER=0 VSPACE=0 HSPACE=0 src=pics/menu_was_2.gif><img WIDTH=18 HEIGHT=18 ALIGN=left BORDER=0 VSPACE=0 HSPACE=0 src=pics/menu_doc_1.gif><A CLASS="rot" HREF="'+link[num][1]+'"  target=unten>'+link[num][2]+'</A>')
}

function linkOut(num) {
        link[num][3] = true
        if (link[num][4]==true)
        layerWrite(link[num][0],null,'<img WIDTH=18 HEIGHT=18 ALIGN=left BORDER=0 VSPACE=0 HSPACE=0 src=pics/menu_ordner_auf.gif><A CLASS="blau" HREF="'+link[num][1]+'"  target=unten>'+link[num][2]+'</A>')
          else
         layerWrite(link[num][0],null,'<img WIDTH=18 HEIGHT=18 ALIGN=left BORDER=0 VSPACE=0 HSPACE=0 src=pics/menu_was_3.gif><img WIDTH=18 HEIGHT=18 ALIGN=left BORDER=0 VSPACE=0 HSPACE=0 src=pics/menu_doc_1.gif><A CLASS="blau" HREF="'+link[num][1]+'"  target=unten>'+link[num][2]+'</A>')
}

function linkOver1(numm)
 {
      if (top.frames.length == 0)
      top.location.href = "index.htm";
      else
      parent.frames[1].linkOver(numm)
}