var imageFiles_1sv_21 = new Array();
imageFiles_1sv_21['0'] = new Array ('_images/1sv_.gif', '_images/1sv_Mouseover.gif');

function image_on_1sv_21 (position) {
   var doc = eval("document.image1sv_21" + position);
   doc.src = imageFiles_1sv_21[position][1];
}

function image_off_1sv_21 (position) {
   var doc = eval("document.image1sv_21" + position);
   doc.src = imageFiles_1sv_21[position][0];
}