function pop800x600(URL) 
{
  Popup = window.open(URL,"PICTURE","width=840,height=640,left=0,top=0,locationbar=no,menubar=no,resizable=no,status=no");
  Popup.focus();
}

function pop600x800(URL) 
{
  Popup = window.open(URL,"PICTURE","width=640,height=840,left=0,top=0,locationbar=no,menubar=no,resizable=no,status=no");
  Popup.focus();
}

function popresizeable(URL) 
{
  Popup = window.open(URL,"POPUP","width=830,height=850,left=0,top=0,locationbar=no,menubar=no,resizable=yes,status=no");
  Popup.focus();
}

function SimpleSwap(el,which){
  el.src=el.getAttribute(which || "origsrc");
}
  function SimpleSwapSetup()
  {
  var x = document.getElementsByTagName("img");
  for (var i=0;i<x.length;i++){
    var oversrc = x[i].getAttribute("oversrc");
    if (!oversrc) continue;
      
    // preload image
    // comment the next two lines to disable image pre-loading
    x[i].oversrc_img = new Image();
    x[i].oversrc_img.src=oversrc;
    // set event handlers
    x[i].onmouseover = new Function("SimpleSwap(this,'oversrc');");
    x[i].onmouseout = new Function("SimpleSwap(this);");
    // save original src
    x[i].setAttribute("origsrc",x[i].src);
  }
}

var PreSimpleSwapOnload =(window.onload)? window.onload : function(){};
window.onload = function(){PreSimpleSwapOnload(); SimpleSwapSetup();}