imgsrc = new Array();
imgsrc[0] = "/img/tab_home.jpg";
imgsrc[1] = "/img/tab_home_u.jpg";
imgsrc[2] = "/img/tab_services.jpg";
imgsrc[3] = "/img/tab_services_u.jpg";
imgsrc[4] = "/img/tab_portfolio.jpg";
imgsrc[5] = "/img/tab_portfolio_u.jpg";
imgsrc[6] = "/img/tab_columns.jpg";
imgsrc[7] = "/img/tab_columns_u.jpg";
imgsrc[8] = "/img/tab_news.jpg";
imgsrc[9] = "/img/tab_news_u.jpg";
imgsrc[10] = "/img/tab_about.jpg";
imgsrc[11] = "/img/tab_about_u.jpg";
imgsrc[12] = "/img/tab_contact.jpg";
imgsrc[13] = "/img/tab_contact_u.jpg";

img = new Array();

for(i=0; i<imgsrc.length; i++){
img[i] = new Image();
img[i].src = imgsrc[i];
}
function highlight(num,imgname){
document.images[imgname].src = img[num].src;
}