if (document.images) {
	blg1on = new Image();
	blg1on.src = "/blog/common/images/blog_menu01on.gif";
	blg1off = new Image();
	blg1off.src = "/blog/common/images/blog_menu01.gif";
	blg2on = new Image();
	blg2on.src = "/blog/common/images/blog_menu02on.gif";
	blg2off = new Image();
	blg2off.src = "/blog/common/images/blog_menu02.gif";
	blg3on = new Image();
	blg3on.src = "/blog/common/images/blog_menu03on.gif";
	blg3off = new Image();
	blg3off.src = "/blog/common/images/blog_menu03.gif";
	blg4on = new Image();
	blg4on.src = "/blog/common/images/blog_menu04on.gif";
	blg4off = new Image();
	blg4off.src = "/blog/common/images/blog_menu04.gif";
	blg5on = new Image();
	blg5on.src = "/blog/common/images/blog_menu05on.gif";
	blg5off = new Image();
	blg5off.src = "/blog/common/images/blog_menu05.gif";
}
function imgOn(imgName) {
	if (document.images) {
		document[imgName].src=eval(imgName+"on.src");
	}
}
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src=eval(imgName+"off.src");
	}
}