[Андрей Параничев]

function newColor(idCell1) { 
   document.getElementById(idCell1).style.backgroundImage= "url(images/hov_gr_but.jpg)"; 
} 
 
function backColor(idCell1) { 
   document.getElementById(idCell1).style.backgroundImage= "url(images/hov_bl_but.jpg)";
}