function showhide(id) {
	var textBlock = document.getElementById(id);
	(textBlock.className == 'show') ? textBlock.className = 'hide' : textBlock.className = 'show';
}

function hide_on(id) {
	var textBlock = document.getElementById(id);
	textBlock.className = 'hide';
}

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) {
		to_home_in = newImage("product_comprater/to_home_in.gif");
		preloadFlag = true;
	}
	if (document.images) {
		to_email_in = newImage("product_comprater/to_email_in.gif");
		preloadFlag = true;
	}
	if (document.images) {
		online_in = newImage("product_comprater/online_in.gif");
		preloadFlag = true;
	}
}