function preInitContents() {
	imgSwap = new Array();
	preloadFlag = false;

	imgSwap["button_01"] = new Image();
	imgSwap["button_01"].src = "/edg/img/contents_button_01o.gif";
	imgSwap["button_02"] = new Image();
	imgSwap["button_02"].src = "/edg/img/contents_button_02o.gif";
	imgSwap["button_03"] = new Image();
	imgSwap["button_03"].src = "/edg/img/contents_button_03o.gif";
	imgSwap["button_04"] = new Image();
	imgSwap["button_04"].src = "/edg/img/contents_button_04o.gif";
	imgSwap["button_05"] = new Image();
	imgSwap["button_05"].src = "/edg/img/contents_button_05o.gif";

	imgSwap["navi_01"] = new Image();
	imgSwap["navi_01"].src = "/edg/shared/img/navi_button_01o.gif";
	imgSwap["navi_02"] = new Image();
	imgSwap["navi_02"].src = "/edg/shared/img/navi_button_02o.gif";
	imgSwap["navi_03"] = new Image();
	imgSwap["navi_03"].src = "/edg/shared/img/navi_button_03o.gif";
	imgSwap["navi_04"] = new Image();
	imgSwap["navi_04"].src = "/edg/shared/img/navi_button_04o.gif";
	imgSwap["navi_05"] = new Image();
	imgSwap["navi_05"].src = "/edg/shared/img/navi_button_05o.gif";

	preloadFlag = true;
	return true;
}

function swapImage(target,src) {
 if (document.images) document.images[target].src = src;
}