if (document.images) 
{
cl1 = new Image; 
cl1.src = "serwis.jpg";
cl2 = new Image; 
cl2.src = "serwis1.jpg";
cl3 = new Image; 
cl3.src = "czesci.jpg";
cl4 = new Image; 
cl4.src = "czesci1.jpg";
cl5 = new Image; 
cl5.src = "dwamon.jpg";
cl6 = new Image; 
cl6.src = "dwamon1.jpg";

}

function jpg(imgName,imgObjName) 
{
if (document.images) 
{
 document.images[imgName].src = eval(imgObjName + ".src");
 }
 }