var imageFiles_1b_4 = new Array();
imageFiles_1b_4['0'] = new Array ('_images/1b_Cat_Toys.gif', '_images/1b_Cat_ToysMouseover.gif');
imageFiles_1b_4['1'] = new Array ('_images/1b_Dog_Toys.gif', '_images/1b_Dog_ToysMouseover.gif');

function image_on_1b_4 (position) {
   var doc = eval("document.image1b_4" + position);
   doc.src = imageFiles_1b_4[position][1];
}

function image_off_1b_4 (position) {
   var doc = eval("document.image1b_4" + position);
   doc.src = imageFiles_1b_4[position][0];
}