function flipphoto(thumbid)
{
	var bigsource = document.getElementById('productphoto').src+'&bo=t';;
	var smallsource = document.getElementById(thumbid).src.substring(0,document.getElementById(thumbid).src.length-5);
	var bigphotolink = smallsource+'&bo=t&big=t';
	document.getElementById('productphoto').src = smallsource;
	document.getElementById(thumbid).src = bigsource;
	document.getElementById('showbiglink').href = 'javascript:showphoto(\''+bigphotolink+'\');';
}