data = new 
Array("images/gnv_01_on.gif","images/gnv_02_on.gif","images/gnv_03_on.gif","images/gnv_04_on.gif","images/gnv_05_on.gif","images/gnv_06_on.gif","images/gnv_07_on.gif","images/gnv_08_on.gif");
prImg= new Array();
for (i=0; i<data.length; i++){
    prImg[i] = new Image();
    prImg[i].src = data[i];
}