var imageFiles_1rx_21 = new Array();
imageFiles_1rx_21['0'] = new Array ('_images/1rx_.gif', '_images/1rx_Mouseover.gif');

function image_on_1rx_21 (position) {
   var doc = eval("document.image1rx_21" + position);
   doc.src = imageFiles_1rx_21[position][1];
}

function image_off_1rx_21 (position) {
   var doc = eval("document.image1rx_21" + position);
   doc.src = imageFiles_1rx_21[position][0];
}