var imageFiles_1su_31 = new Array();
imageFiles_1su_31['0'] = new Array ('_images/1su_.gif', '_images/1su_Mouseover.gif');

function image_on_1su_31 (position) {
   var doc = eval("document.image1su_31" + position);
   doc.src = imageFiles_1su_31[position][1];
}

function image_off_1su_31 (position) {
   var doc = eval("document.image1su_31" + position);
   doc.src = imageFiles_1su_31[position][0];
}