var imageFiles_ch_29 = new Array();
imageFiles_ch_29['0'] = new Array ('_images/ch_Home.gif', '_images/ch_HomeMouseover.gif');

function image_on_ch_29 (position) {
   var doc = eval("document.imagech_29" + position);
   doc.src = imageFiles_ch_29[position][1];
}

function image_off_ch_29 (position) {
   var doc = eval("document.imagech_29" + position);
   doc.src = imageFiles_ch_29[position][0];
}