function imprint(isIn){
         if(isIn){
            $("#overlay").fadeTo("fast",0.8);
            $("#impressum").fadeIn("fast");
           }
         else{
            $("#overlay").fadeOut("fast");
            $("#impressum").fadeOut("fast");
           }
         }
         
function activeLink(f){
	 divs = document.getElementById("menuLeft").getElementsByTagName("div");
	 for(i=0;i<divs.length;i++){
	     if(divs[i].className == "m_on") divs[i].style.display = "none";
	     if(divs[i].className == "m_off") divs[i].style.display = "block";
	     }
	 
	 divs = f.getElementsByTagName("div");
	 for(i=0;i<divs.length;i++){
	     if(divs[i].className == "m_on") divs[i].style.display = "block";
	     if(divs[i].className == "m_off") divs[i].style.display = "none";	
	     }
	
	 }
	 
function initMenu(){
	 allA = document.getElementById('menuLeft').getElementsByTagName('a');
	 activeLink(allA[0]);
	 }