{
        homeOff = new Image(); homeOff.src = "/Images/nav_home.gif";
        homeOn  = new Image(); homeOn.src  = "/Images/nav_home_on.gif";				
        ugradOff = new Image(); ugradOff.src = "/Images/nav_undergraduate.gif";
        ugradOn  = new Image(); ugradOn.src  = "/Images/nav_undergraduate_on.gif";
        alumniOff = new Image(); alumniOff.src = "/Images/nav_alumni.gif";
        alumniOn  = new Image(); alumniOn.src  = "/Images/nav_alumni_on.gif";
        resourcesOff = new Image(); resourcesOff.src = "/Images/nav_resources.gif";
        resourcesOn  = new Image(); resourcesOn.src  = "/Images/nav_resources_on.gif";
        chaptersOff = new Image(); chaptersOff.src = "/Images/nav_chapters.gif";
        chaptersOn  = new Image(); chaptersOn.src  = "/Images/nav_chapters_on.gif";
        foundationOff = new Image(); foundationOff.src = "/Images/nav_foundation.gif";
        foundationOn  = new Image(); foundationOn.src  = "/Images/nav_foundation_on.gif";
        aboutusOff = new Image(); aboutusOff.src = "/Images/nav_aboutus.gif";
        aboutusOn  = new Image(); aboutusOn.src  = "/Images/nav_aboutus_on.gif";
        centennialOff = new Image(); centennialOff.src = "/Images/nav_centennial.gif";
        centennialOn  = new Image(); centennialOn.src  = "/Images/nav_centennial_on.gif";
}

function changeImage(imgDocID1,imgObjName1 )

{
	{
        document.images[imgDocID1].src = eval(imgObjName1 + ".src");
    }
}


/*
on page use:
In header
<SCRIPT LANGUAGE="JavaScript" src="_controls/ImageCode.js"></SCRIPT>

On image links
<A HREF="/" onmouseover="changeImage('home', 'homeOn')" onmouseout="changeImage('home','homeOff')"><IMG NAME="home" src="/Images/home.gif" BORDER="0" ALT="Ballantrae Home"></A>
*/
function openNewWin(theUrl){
window.open( theUrl, 'NewWindow', 'toolbar=no,scrollbars=no,location=no,statusbar=no,menubar=no,resizable=no' );
      popup.focus();

}
<!-- //javascript:myTest(""Hello"") -->