var imageFiles_ms_4 = new Array();
imageFiles_ms_4['0'] = new Array ('_images/ms_Home.gif', '_images/ms_HomeMouseover.gif');
imageFiles_ms_4['1'] = new Array ('_images/ms_Collision.gif', '_images/ms_CollisionMouseover.gif');
imageFiles_ms_4['2'] = new Array ('_images/ms_Contact_Us.gif', '_images/ms_Contact_UsMouseover.gif');
imageFiles_ms_4['3'] = new Array ('_images/ms_.gif', '_images/ms_Mouseover.gif');
imageFiles_ms_4['4'] = new Array ('_images/ms_510___793___8157.gif', '_images/ms_510___793___8157Mouseover.gif');

function image_on_ms_4 (position) {
   var doc = eval("document.imagems_4" + position);
   doc.src = imageFiles_ms_4[position][1];
}

function image_off_ms_4 (position) {
   var doc = eval("document.imagems_4" + position);
   doc.src = imageFiles_ms_4[position][0];
}