var i = 0;
     imageObj = new Image();
     images = new Array();
     images[0]="siteimg/cbutton0.gif"
     images[1]="siteimg/cbutton1.gif"
     images[2]="siteimg/cbutton2.gif"
     images[3]="siteimg/cbutton3.gif"
     images[4]="siteimg/cbutton4.gif"
     images[5]="siteimg/cbutton5.gif"
     images[6]="siteimg/cbutton0o.gif"
     images[7]="siteimg/cbutton1o.gif"
     images[8]="siteimg/cbutton2o.gif"
     images[9]="siteimg/cbutton3o.gif"
     images[10]="siteimg/cbutton4o.gif"
     images[11]="siteimg/cbutton5o.gif"


     for(i=0; i <= images.length - 1; i++) 
     {
          imageObj.src=images[i];
     }