var imageFiles_5_31 = new Array();
imageFiles_5_31['0'] = new Array ('_images/5_Risk_Assessment.gif', '_images/5_Risk_AssessmentMouseover.gif');
imageFiles_5_31['1'] = new Array ('_images/5_Site_Investigation.gif', '_images/5_Site_InvestigationMouseover.gif');
imageFiles_5_31['2'] = new Array ('_images/5_Asbestos.gif', '_images/5_AsbestosMouseover.gif');

function image_on_5_31 (position) {
   var doc = eval("document.image5_31" + position);
   doc.src = imageFiles_5_31[position][1];
}

function image_off_5_31 (position) {
   var doc = eval("document.image5_31" + position);
   doc.src = imageFiles_5_31[position][0];
}