var imageFiles_7t_21 = new Array();
imageFiles_7t_21['0'] = new Array ('_images/7t_SmartLine_com.gif', '_images/7t_SmartLine_comMouseover.gif');

function image_on_7t_21 (position) {
   var doc = eval("document.image7t_21" + position);
   doc.src = imageFiles_7t_21[position][1];
}

function image_off_7t_21 (position) {
   var doc = eval("document.image7t_21" + position);
   doc.src = imageFiles_7t_21[position][0];
}