function cm(t){
var d = document.getElementById("menu");

var url = 'url(img/menu-overs/'+t+'.jpg)';
if( t=='d') url = 'url(img/menu.jpg)';

d.style.backgroundImage = url;

}
function projShow(t){
var d = document.getElementById("projCon");

var url = 'url(img/proj-con/'+t+'.jpg)';

d.style.backgroundImage = url;

}
function vidShow(t){
var d = document.getElementById("projCon");

var url = 'url(img/proj-vid/'+t+'.jpg)';

d.style.backgroundImage = url;

}