var iversion = -1;
function version() {
	
        if (iversion != -1) return iversion;
        
        if(navigator.appName.indexOf("Netscape") != -1){   // Netscape.
                if (navigator.userAgent.indexOf("Mozilla/2") != -1)
                	iversion = 2;
                else
                	if (navigator.userAgent.indexOf("Mozilla/3") != -1)
                        	iversion = 3;
                	else
                        	if (navigator.userAgent.indexOf("Mozilla/4") != -1)
                                	iversion = 4;
                                else
                                	if (navigator.userAgent.indexOf("Mozilla/5") != -1)
                                        	iversion = 5;
                                        else
                                            	iversion = 1;
        }  else {  // Internet Explorer
           if(navigator.appName.indexOf("Internet Explorer") != -1){
           	if (navigator.userAgent.indexOf("Mozilla/4") != -1)
                	iversion = 4;
                else
                	if (navigator.userAgent.indexOf("Mozilla/5") != -1)
                		iversion = 5;
                	else
                        	iversion = 1;
        } else  // Other Browsers
          	iversion = 1;
        }
        return iversion;
}

if (3 <= version())
{

homeon = new Image(109,21);
homeon.src = "/images/nav_home1.GIF";
homeoff = new Image(109,21);
homeoff.src = "/images/nav_home0.GIF";
ypageson = new Image(109,21);
ypageson.src = "/images/nav_ypages1.GIF";
ypagesoff = new Image(109,21);
ypagesoff.src = "/images/nav_ypages0.GIF";
searchon = new Image(109,21);
searchon.src = "/images/nav_search1.GIF";
searchoff = new Image(109,21);
searchoff.src = "/images/nav_search0.GIF";
abouton = new Image(109,21);
abouton.src = "/images/nav_about1.GIF";
aboutoff = new Image(109,21);
aboutoff.src = "/images/nav_about0.GIF";
contributeon = new Image(109,21);
contributeon.src = "/images/nav_contribute1.GIF";
contributeoff = new Image(109,21);
contributeoff.src = "/images/nav_contribute0.GIF";
contacton = new Image(109,21);
contacton.src = "/images/nav_contact1.GIF";
contactoff = new Image(109,21);
contactoff.src = "/images/nav_contact0.GIF";
mliston = new Image(109,21);
mliston.src = "/images/nav_mlist1.GIF";
mlistoff = new Image(109,21);
mlistoff.src = "/images/nav_mlist0.GIF";
jobson = new Image(109,21);
jobson.src = "/images/nav_jobs1.GIF";
jobsoff = new Image(109,21);
jobsoff.src = "/images/nav_jobs0.GIF";

}

function rollon(imgName) {
        if (3 <= iversion) {
        document[imgName].src = eval(imgName + "on.src");
}
}

function rolloff(imgName) {
        if (3 <= iversion) {
        document[imgName].src = eval(imgName + "off.src");
}
}
// -->