var imageFiles_7q_91 = new Array();
imageFiles_7q_91['0'] = new Array ('_images/7q_Natural_Characteristics.gif', '_images/7q_Natural_CharacteristicsMouseover.gif');

function image_on_7q_91 (position) {
   var doc = eval("document.image7q_91" + position);
   doc.src = imageFiles_7q_91[position][1];
}

function image_off_7q_91 (position) {
   var doc = eval("document.image7q_91" + position);
   doc.src = imageFiles_7q_91[position][0];
}