function mouseOverProc()
{
  var s = this.src;
  this.src = s.replace(/^(.*)\.gif$/, "$1_a.gif");
}
function mouseOutProc()
{
  var s = this.src;
  this.src = s.replace(/^(.*)\_a.gif$/, "$1.gif");
}
function target_blank( url ){
  var window=open( url,"sub_window","width=310,height=580,resizable=0,scrollbars=no,toolbar=0,menubar=0,location=0,directories=0,status=0,left=10,top=10,screenX=10,screenY=10");
  window.focus();
}
function init()
{
  var im = document.getElementsByTagName('img');

  for (var i = 0; i < im.length; i++){
    var t = im[i];
    if (t.className == "hover"){
      t.onmouseover = mouseOverProc;
      t.onmouseout = mouseOutProc;
    }
  }
}

window.onload = init;

function wopen( url ){
		window.open( url,"","toolbar=yes,location=yes,directions=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes" );
}