function imageSwap(imgObj) {
 var slikaName = imgObj.name;
 var parts = slikaName.split("_");
 //alert(parts);
 if(parts.length == 1) {
 	imgObj.name +="_on";
 	imgObj.src = "gumbi/"+imgObj.name+".jpg";
 } else {
 	imgObj.name = parts[0];
 	imgObj.src = "gumbi/"+imgObj.name+".jpg";
 }
 
 //alert(slikaSrc);
}