function newImage(arg) {if (document.images) {rslt = new Image(); rslt.src = arg; return rslt;}} function changeImages() {if (document.images && (preloadFlag == true)) {for (var i=0; i<changeImages.arguments.length; i+=2) {document[changeImages.arguments[i]].src = changeImages.arguments[i+1];}}} var preloadFlag = false; function preloadImages() {if (document.images) {insyou_over = newImage("images/insyou-over.gif"); info_over = newImage("images/info-over.gif"); happou_over = newImage("images/happou-over.gif"); tentyou_over = newImage("images/tentyou-over.gif"); preloadFlag = true;}}