function newImage( imgSrc ){

 var imgName = new Image();
 imgName.src = imgSrc;

 return imgName;

}

function change( imgName, imgLocation )
{
 document[imgName].src = imgLocation ;
}

function changecaption(text) {
   if(document.getElementById) {
      document.getElementById("caption").innerHTML=text;
   }
}


function newWindow(mypage, myname, w, h, scroll) {
   var winl = 20;//(screen.width - w) / 2;
   var wint = (screen.height - h) / 2;
   winprops =
   'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable,menubar'
   win = window.open(mypage, myname, winprops)
   if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
   }