var l_width = '400';	//main image width
var l_height= '265';	//main image height
var s_width = '100';	//thumb image width
var s_height= '66';	//thumb image height
var path = '/images/product_images/';	//product image file path

function showImg(product_id){
	l1= path + product_id + '_l1.jpg';
	l2= path + product_id + '_l2.jpg';
	l3= path + product_id + '_l3.jpg';
	l4= path + product_id + '_l4.jpg';
	s1= path + product_id + '_s1.jpg';
	s2= path + product_id + '_s2.jpg';
	s3= path + product_id + '_s3.jpg';
	s4= path + product_id + '_s4.jpg';
	document.write( '<div id="c-main-img"><div class="image">' +
	'<IMG src="' + l1 + '" width="' + l_width + '" height="' + l_height + '" border="0" name="swmainimg">' +
	'</DIV></div>');
	document.write('<div id="c-sub-img">');
	document.write('<DIV class="s-image">' +
	'<A href="javascript:chgImg(l1);">' +
	'<IMG src="' + s1 + '" width="' + s_width + '" height="' + s_height + '" border="0">' +
	'</A>' +
	'</DIV>');
	document.write('<DIV class="s-image">' +
	'<A href="javascript:chgImg(l2);">' +
	'<IMG src="' + s2 + '" width="' + s_width + '" height="' + s_height + '" border="0">' +
	'</A>' +
	'</DIV>');
	document.write('<DIV class="s-image">' +
	'<A href="javascript:chgImg(l3);">' +
	'<IMG src="' + s3 + '" width="' + s_width + '" height="' + s_height + '" border="0">' +
	'</A>' +
	'</DIV>');	document.write('<DIV class="s-image">' +
	'<A href="javascript:chgImg(l4);">' +
	'<IMG src="' + s4 + '" width="' + s_width + '" height="' + s_height + '" border="0">' +
	'</A>' +
	'</DIV>');
	document.write('</DIV>');
}

function chgImg(name){document.swmainimg.src = name;}