function swap_large_image (image) {
	$('large_image').innerHTML = '<img src="images/products/large/'+image+'" width="300" height="300" alt="20series CVT" align="right" />';//"images/products/large/conv_sys.jpg";
}
function previous_page(page){
var new_page = parseInt(page)-1;
window.location = '?page=' + new_page;
}
function next_page() {
var new_page = parseInt(page)+1;
window.location = '?page=' + new_page;
}
// 
// window.onscroll = function()
// {
// 	console.log(document.documentElement.scrollTop);
// 	if( window.XMLHttpRequest ) { // IE 6 doesn't implement position fixed nicely...
// 	if (document.documentElement.scrollTop > 176 || self.pageYOffset > 176) {
// 	$('catalog_nav_box').style.position = 'fixed';
// 	$('catalog_nav_box').style.top = '0';
// 	} else if (document.documentElement.scrollTop < 176 || self.pageYOffset < 176) {
// 	$('catalog_nav_box').style.position = 'relative';
// 	$('catalog_nav_box').style.top = '0';
// 	}
// 	}
// }