function valtas(id){
    
	for (i=1; i<=11; i++) {
		document.getElementById('menu'+i).style.fontWeight=""
		document.getElementById('menu'+i).style.color="";
	}

   
   document.getElementById(id).style.fontWeight="bold"
   document.getElementById(id).style.color="#5D9732";
   window.scrollTo(0,0);
   
}
  

function valtas2(id){
    
	for (i=1; i<=20; i++) {
		document.getElementById('exi'+i).style.fontWeight=""
		document.getElementById('exi'+i).style.color="";
	}

   
   document.getElementById(id).style.fontWeight="bold"
   document.getElementById(id).style.color="#000000";
   window.scrollTo(0,0);

   
}
 

function kiallitok(){
  setTimeout("toggleBox('kiallitokmezo',1)",500);
}


<!--
function toggleBox(szDivID, iState) // 1 visible, 0 hidden
{
    if(document.layers)	   //NN4+
    {
       document.layers[szDivID].visibility = iState ? "show" : "hide";
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(szDivID);
        obj.style.visibility = iState ? "visible" : "hidden";
    }
    else if(document.all)	// IE 4
    {
        document.all[szDivID].style.visibility = iState ? "visible" : "hidden";
    }
}