function SwapImage(ImgName) {
document.getElementById("mainimage").src="http://www.shop4antiques.co.uk/images/upload/med_" + ImgName;
}

function OpenImage() {
	var imagewindow = '';
	var imagesrc = document.getElementById("mainimage").src;	
	ImageName = imagesrc.substring(49);

	if (!imagewindow.closed && imagewindow.location) {
		imagewindow.close();		
	}	
	
	imagewindow=window.open('http://www.shop4antiques.co.uk/image.php?image=' + ImageName,'imagewindow','height=380,width=380');
	if (!imagewindow.opener) imagewindow.opener = self;
	if (window.focus) {imagewindow.focus()}
	return false;
}