// JavaScript Document

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) {
		head_topbtn_over = newImage("img/head_topbtn_over.gif");
		btn1_news_over = newImage("img/btn1_news_over.gif");
		btn2_clmn_over = newImage("img/btn2_clmn_over.gif");
		btn3_kojin_over = newImage("img/btn3_kojin_over.gif");
		btn4_kigyo_over = newImage("img/btn4_kigyo_over.gif");
		btn5_cmpny_over = newImage("img/btn5_cmpny_over.gif");
		preloadFlag = true;
	}
}

//