function change_tab(tab) {
    var menu = document.getElementById('menu_news');
    var childNodes = menu.childNodes;
    var next = false;
    var prev = null;
    for (var c=0;c<childNodes.length;c++) {
	node = childNodes[c];
	var cn = node.childNodes;	
	if (tab == node) {
	    cn[0].src = "/images/news/klaw_05.jpg";
	    cn[1].className = "high"
	    cn[2].src = "/images/news/klaw_07.jpg";
	    next = true;
	    if (prev != null) {
		prev.src = "/images/news/klaw_04.jpg";
	    }
	} else if (node.nodeName == "DIV" && node.id != "menu_top_t") {
	    cn[1].className = ""
	    if (next) {
		cn[0].src = "/images/news/klaw_04.jpg";
		next = false;
	    } else {
		cn[0].src = "/images/news/klaw_01.jpg";
	    }
	    if (node.id == "last_tab") {
		cn[2].src = "/images/news/klaw_08.jpg";
	    } else {
		cn[2].src = "/images/news/klaw_03.jpg";
		prev = cn[2];
	    }
	}
    }
}