var currentD	=	'';
var currentP	=	'';
function openLayer(div,parent){
	if(div!=currentD){
		myDiv	=	document.getElementById(div);		
		myDiv.style.display='block';
		myDiv	=	document.getElementById(parent);
		myDiv.style.height='170px';

		if(currentD!=''&&currentP!=''){
			myDiv	=	document.getElementById(currentD);	
			myDiv.style.display='none';
			myDiv	=	document.getElementById(currentP);
			myDiv.style.height='50px';
		}
		currentD	=	div;
		currentP	=	parent;
	}
}

function changeBack(div,over){
	if(over){
		divMenu	=	document.getElementById(div);
		divMenu.style.backgroundImage	=	'url( http://www.prepahec.com/img/'+div+'-bgTO.gif)';
		divMenu.style.color="yellow";
	}else{
		divMenu	=	document.getElementById(div);
		divMenu.style.backgroundImage	=	'url( http://www.prepahec.com/img/'+div+'-bgT.gif)';	
		divMenu.style.color="white";
	}
}