var iversion = -1;

function version() {
	if (iversion != -1) return iversion;
        if(navigator.appName.indexOf("Netscape") != -1){
                if (navigator.userAgent.indexOf("Mozilla/2.0") != -1) 
                				iversion = 2;
                	else
                	    if (navigator.userAgent.indexOf("Mozilla/3.0") != -1) 
                					iversion = 3;
                			else
                        		if (navigator.userAgent.indexOf("Mozilla/4.0") != -1)
                        			iversion = 4;
                        		else
                        		    iversion = 1;
        }  else {  // Not netscape.
                if(navigator.appName.indexOf("Internet Explorer") != -1){
                     if (navigator.userAgent.indexOf("Mozilla/4.0") != -1) 
                     		iversion = 4; 
                         else	
                            iversion = 1;
                     } else 
                     	iversion = 1;
               }
	return iversion;
}


if (3 <= version()) {
nav_menu_1on = new Image();
nav_menu_1on.src = "images/reginita.gif";
nav_menu_1off = new Image();
nav_menu_1off.src = "images/reginit.gif";
nav_menu_2on = new Image();
nav_menu_2on.src = "images/newsa.gif";
nav_menu_2off = new Image();
nav_menu_2off.src = "images/news.gif";
nav_menu_3on = new Image();
nav_menu_3on.src = "images/abouta.gif";
nav_menu_3off = new Image();
nav_menu_3off.src = "images/about.gif";
nav_menu_4on = new Image();
nav_menu_4on.src = "images/sitesa.gif";
nav_menu_4off = new Image();
nav_menu_4off.src = "images/sites.gif";
nav_menu_5on = new Image();
nav_menu_5on.src = "images/minigranta.gif";
nav_menu_5off = new Image();
nav_menu_5off.src = "images/minigrant.gif";
nav_menu_6on = new Image();
nav_menu_6on.src = "images/edua.gif";
nav_menu_6off = new Image();
nav_menu_6off.src = "images/edu.gif";
nav_menu_7on = new Image();
nav_menu_7on.src = "images/calendara.gif";
nav_menu_7off = new Image();
nav_menu_7off.src = "images/calendar.gif";
nav_menu_8on = new Image();
nav_menu_8on.src = "images/old_sitea.gif";
nav_menu_8off = new Image();
nav_menu_8off.src = "images/old_site.gif";
}
function rollon(imgName) {
	if (3 <= iversion) {
	imgOn = eval(imgName + "on.src");
	document[imgName].src = imgOn;
	}
	var soundTest = document.ding;

    if (soundTest != null) {
    document.ding.play(false);
    }
}
function rolloff(imgName) {
	if (3 <= iversion) {
	document[imgName].src = eval(imgName + "off.src");
	}
}