var loadImages  = new Object();

var rootKeyword = "images";

var addImage = new Array();
	addImage[0] = "images/bullet_arrow_over.gif";
	addImage[1] = "images/tab_date_over.gif";
	addImage[2] = "images/bg_timecell_over.gif";
	addImage[3] = "images/btn_channel_over.gif";
	addImage[4] = "images/btn_channel_active.gif";
	addImage[5] = "images/btn_channel_active2.gif";
	addImage[6] = "images/tab_broadcast_over.gif";
	addImage[7] = "images/tab_broadcast_active.gif";


function imagePreLoad() {
	if (document.getElementById) {
		var basePath = seekRoot(rootKeyword);
		for (i in addImage) {
			loadImages["add" + i] = new Image();
			loadImages["add" + i].src = basePath + addImage[i];
		}
		return true;
	} else {
		return false;
	}
}


function seekRoot(keyword) {
	if (document.getElementById) {
		var targetSrc;
		var basePath;
		for (i=0; i<document.getElementsByTagName("img").length; i++) {
			targetSrc = document.getElementsByTagName("img")[i].src;
			if (targetSrc.split(keyword).length >= 2) {
				basePath = targetSrc.split(keyword)[0];
				break;
			}
		}
		return basePath;
	}
}