//先読み
var preloads = new Array("article_thumbnail_on.jpg","article_thumbnail_on.gif","close_on.gif","arrow_on.gif");
var Images = new Array();
for(i=0;i<preloads.length;i++){
	Images[i] = new Image();
	Images.src = "/images/" + preloads[i];
}

function changeMainImage(img){
	changeImage(document.getElementById('mainimage'),img);
}
function changeImage(elm,img){
	elm.setAttribute("src",img);
}

function openDetailWindow(url){
	window.open(url,"","width=790,height=650,toolbar=yes,scrollbars=yes,menubar=yes,resizable=yes");
}