var popup_image;

function open_popup_image(width, height, scroll) {

	winwidth=width+52;
	winheight=height+172;

	if(popup_image)
	   popup_image.close();
	
	popup_image=window.open('', 'popup_image','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+scroll+',resizable=0,width='+winwidth+',height='+winheight);
	popup_image.focus();

}