function hide_all(){
	document.getElementById('products').style.display = 'none';
	document.getElementById('projects').style.display = 'none';
	document.getElementById('cooperators').style.display = 'none';
	document.getElementById('abilities').style.display = 'none';
	document.getElementById('about').style.display = 'none';
}
function show_menu(menu,top,right){
	hide_all();
	var width = parseInt(screen.width) - 800;
	right = parseInt(right)+350;
	switch(screen.width){
		case 800:
		X = 1;
		break;
		case 1024:
		X = 1.55;
		break;
		case 1152:
		X = 1.63;
		break;
		case 1280:
		X = 1.7;
		break;
	}
	var element = document.getElementById(menu);
	element.style.top = top;
	element.style.right = (parseInt(right) + width)/X;
	element.style.display = 'block';
	window.setTimeout("hide_all()",4500);
}