var imageFiles_2x_13 = new Array();
imageFiles_2x_13['0'] = new Array ('_images/2x_Slideshow.gif', '_images/2x_SlideshowMouseover.gif');
imageFiles_2x_13['1'] = new Array ('_images/2x_Videos.gif', '_images/2x_VideosMouseover.gif');
imageFiles_2x_13['2'] = new Array ('_images/2x_In_the_News.gif', '_images/2x_In_the_NewsMouseover.gif');
imageFiles_2x_13['3'] = new Array ('_images/2x_Newsletters.gif', '_images/2x_NewslettersMouseover.gif');
imageFiles_2x_13['4'] = new Array ('_images/2x_Books___Publications.gif', '_images/2x_Books___PublicationsMouseover.gif');

function image_on_2x_13 (position) {
   var doc = eval("document.image2x_13" + position);
   doc.src = imageFiles_2x_13[position][1];
}

function image_off_2x_13 (position) {
   var doc = eval("document.image2x_13" + position);
   doc.src = imageFiles_2x_13[position][0];
}