function f_swapimage(product_img_id) {
	thumbimg_new = document.getElementById('img0').src;
	mainimg_new = document.getElementById(product_img_id).src;
	thumbtitle_new = document.getElementById('img0').title;
	maintitle_new = document.getElementById(product_img_id).title;

	// set thumbnail to current main image
	document.getElementById(product_img_id).src = thumbimg_new.replace("/med/","/tiny/");
	// set main image to selected thumb image
	document.getElementById('img0').src = mainimg_new.replace("/tiny/","/med/");

	// set thumbnail to current main image
	document.getElementById(product_img_id).title = thumbtitle_new;
	// set main image to selected thumb image
	document.getElementById('img0').title = maintitle_new;
	// set the main caption (if exists)
	if (document.getElementById('img0caption')) {
		document.getElementById('img0caption').innerHTML = maintitle_new;
	}

	// set the main image enlarge link
	document.getElementById('href0').href = mainimg_new.replace("/tiny/","/lrg/");
}

function f_enlargeimage(v_product_id,image) {
	window.location.href="view.php?i=" + v_product_id + "&pi=" + image
}