var imageFiles_4d_31 = new Array();
imageFiles_4d_31['0'] = new Array ('_images/4d_Steel.gif', '_images/4d_SteelMouseover.gif');
imageFiles_4d_31['1'] = new Array ('_images/4d_Winter_Products.gif', '_images/4d_Winter_ProductsMouseover.gif');
imageFiles_4d_31['2'] = new Array ('_images/4d_Concrete.gif', '_images/4d_ConcreteMouseover.gif');
imageFiles_4d_31['3'] = new Array ('_images/4d_Glass_Block.gif', '_images/4d_Glass_BlockMouseover.gif');
imageFiles_4d_31['4'] = new Array ('_images/4d_Roofing.gif', '_images/4d_RoofingMouseover.gif');
imageFiles_4d_31['5'] = new Array ('_images/4d_Drywall_Plaster.gif', '_images/4d_Drywall_PlasterMouseover.gif');
imageFiles_4d_31['6'] = new Array ('_images/4d_Bag_Products.gif', '_images/4d_Bag_ProductsMouseover.gif');
imageFiles_4d_31['7'] = new Array ('_images/4d_Tools_misc_.gif', '_images/4d_Tools_misc_Mouseover.gif');
imageFiles_4d_31['8'] = new Array ('_images/4d_Brick_Block.gif', '_images/4d_Brick_BlockMouseover.gif');
imageFiles_4d_31['9'] = new Array ('_images/4d_Landscaping.gif', '_images/4d_LandscapingMouseover.gif');
imageFiles_4d_31['10'] = new Array ('_images/4d_Fireplaces_etc_.gif', '_images/4d_Fireplaces_etc_Mouseover.gif');
imageFiles_4d_31['11'] = new Array ('_images/4d_Asphalt.gif', '_images/4d_AsphaltMouseover.gif');

function image_on_4d_31 (position) {
   var doc = eval("document.image4d_31" + position);
   doc.src = imageFiles_4d_31[position][1];
}

function image_off_4d_31 (position) {
   var doc = eval("document.image4d_31" + position);
   doc.src = imageFiles_4d_31[position][0];
}