function switchvisible(divid, topic1, topic2, topic3, menuid){ 
var divarray= new Array(topic1,topic2, topic3); 
document.getElementById('loaddiv').style.visibility="hidden";
for(i=0; i<divarray.length; i++){ 
      if(divarray[i] == divid){ 
            document.getElementById(divid).style.visibility="visible";
	    document.getElementById(menuid).style.top="8px";
	    document.getElementById(menuid).style.backgroundColor="black";
      }else{ 
	      if(menuid == "menu1"){
		      document.getElementById('menu2').style.top="6px";
		      document.getElementById('menu3').style.top="6px";
		      document.getElementById('menu2').style.backgroundColor="#28140C";
		      document.getElementById('menu3').style.backgroundColor="#28140C";
	      }else if (menuid == "menu2"){
		      document.getElementById('menu1').style.top="6px";
		      document.getElementById('menu3').style.top="6px";
		      document.getElementById('menu1').style.backgroundColor="#28140C";
		      document.getElementById('menu3').style.backgroundColor="#28140C";
	      }else{
		      document.getElementById('menu1').style.top="6px";
		      document.getElementById('menu2').style.top="6px";
		      document.getElementById('menu1').style.backgroundColor="#28140C";
		      document.getElementById('menu2').style.backgroundColor="#28140C";
	      }
            document.getElementById(divarray[i]).style.visibility="hidden";
      } 
   } 
}