// Beginning of JavaScript -

if(document.images)
   {
    var sag1a=new Image();
    sag1a.src="images/b1a.gif";

    var sag1=new Image();
    sag1.src="images/b1.gif";
  }
   {
    var sag2a=new Image();
    sag2a.src="images/b2a.gif";

    var sag2=new Image();
    sag2.src="images/b2.gif";
  }
   {
    var sag3a=new Image();
    sag3a.src="images/b3a.gif";

    var sag3=new Image();
    sag3.src="images/b3.gif";
  }
   {
    var sag4a=new Image();
    sag4a.src="images/b4a.gif";

    var sag4=new Image();
    sag4.src="images/b4.gif";
  }

function over(imgName, sagName)
    {
     if(document.images)
	{
	document[imgName].src = eval(sagName + "a.src");
	}
}

function out(imgName, sagName)
    {
     if(document.images)
       {
	document[imgName].src = eval(sagName + ".src");
       }

}

// - End of JavaScript -