function openPicture(imb) 
{
window.open('image_show.php?code='+ imb +'', 'comsyco', 'status=no,menubar=no,resizable=no,scrollbars=yes,width=410,height=310');
}
function plus (r)
{
	document.forms['cart'+r].elements['num'].value++;
}
	
function minus (r)
{
	document.forms['cart'+r].elements['num'].value--;
	 
	if(document.forms['cart'+r].elements['num'].value<0){
	   document.forms['cart'+r].elements['num'].value=0;
	}
		 
}