/* Created by Acenius IT solutions (c) 2002
     Visit us at: http://www.acenius.com
	 E-mail info@acenius.com 
*/

function home() {
      parent.header.location = "header.html"; 
    return;
    }
	
function subjects() {
      parent.header.location = "header_subjects.html"; 
    return;
    }
	
function news() {
      parent.header.location = "header_news.html";
    return;
    }
	
function authors() {
      parent.header.location = "header_authors.html"; 
    return;
    }
	
function aboutus() {
      parent.header.location = "header_about-us.html"; 
    return;
    }

function order() {
     parent.header.location = "header_order.html"; 
    return;
    }
	
function linkpage() {
     parent.header.location = "header_links.html"; 
    return;
    }

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) {
		but_home_over = newImage("images/but_home-over.gif");
		but_subjects_over = newImage("images/but_subjects-over.gif");
		but_news_over = newImage("images/but_news-over.gif");
		but_authors_over = newImage("images/but_authors-over.gif");
		but_fairs_over = newImage("images/but_fairs-over.gif");
		but_links_over = newImage("images/but_links-over.gif");
		preloadFlag = true;
	}
}