var ie5 = (document.all && document.getElementById);
	var ns6 = (!document.all && document.getElementById); 
	var clipY=0;
	var useCovers = true;
	
	function showMenu () {
	 	clearTimeout(t);
		if (clipY==0) {
			document.getElementById("menudrop").style.display="inline";
			menuDown();
		}
	}
	
	function hideMenu () {
        if ( useCovers )
		{
		    document.getElementById("cover1").style.display="none";
		    document.getElementById("cover2").style.display="none";
 		    menuUp();
 		}
	}
	
	 function openMenu () {
		t=setTimeout("showMenu()",400) 
	}

	function menuDown(){ 
		if(ie5||ns6){
			document.getElementById("menudrop").style.clip="rect(0,1024px,"+ clipY +"px,0)";
			if (clipY< document.getElementById('menudrop').offsetHeight-5){
				clipY+=5;
				if (clipY < 50) {clipY+=4}	//extra snel open	
				setTimeout("menuDown()",15);
			}else{
				clipY=document.getElementById('menudrop').offsetHeight;
				document.getElementById("cover1").style.display="inline";
				document.getElementById("cover2").style.display="inline";
			}
		}
	}
	
	function menuUp(){ 
		if(ie5||ns6){
			document.getElementById("menudrop").style.clip="rect(0,1024px,"+ clipY +"px,0)";
			if (clipY > 0){
				clipY-=10
				if (clipY < 50) {clipY-=4} //extra snel dicht				
				setTimeout("menuUp()",10);
			}else{
				clipY=0;
				document.getElementById("menudrop").style.display="none"
			}
		}
	}