function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		image_01_over = newImage("images/menu_home_selected.jpg");
		image_01_down = newImage("images/menu_home_default.jpg");
		image_02_over = newImage("images/menu_about_selected.jpg");
		image_02_down = newImage("images/menu_about_default.jpg");
		image_03_over = newImage("images/menu_members_selected.jpg");
		image_03_down = newImage("images/menu_members_default.jpg");
		image_04_over = newImage("images/menu_news_selected.jpg");
		image_04_down = newImage("images/menu_news_default.jpg");
		image_05_over = newImage("images/menu_events_selected.jpg");
		image_05_down = newImage("images/menu_events_default.jpg");
		image_06_over = newImage("images/menu_public_selected.jpg");
		image_06_down = newImage("images/menu_public_default.jpg");
		image_07_over = newImage("images/menu_publications_selected.jpg");
		image_07_down = newImage("images/menu_publications_default.jpg");
		image_08_over = newImage("images/menu_contact_selected.jpg");
		image_08_down = newImage("images/menu_contact_default.jpg");	
		preloadFlag = true;
	}
}

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";
    }
}