var p = 43;   		// stevilo slik

var preBuffer = new Array();
for (i = 0; i < p; i++){
   preBuffer[i] = new Image();
   preBuffer[i].src = (p+1) + '_Lumpert.jpg';
}
var whichImage = Math.round(Math.random()*(p-1)) + 1;

document.write('<style type="text/css"> .velikibrat { background-image:url(../images/'+whichImage+'_Lumpert.jpg) } </style>');