var imageFiles_m_91 = new Array();
imageFiles_m_91['0'] = new Array ('_images/m_Classroom.gif', '_images/m_ClassroomMouseover.gif');

function image_on_m_91 (position) {
   var doc = eval("document.imagem_91" + position);
   doc.src = imageFiles_m_91[position][1];
}

function image_off_m_91 (position) {
   var doc = eval("document.imagem_91" + position);
   doc.src = imageFiles_m_91[position][0];
}