function initPopups() {  
	if(!document.getElementsByTagName) { 
         return; 
    }
	// add an onclick event to every hyperlink with a class of 'popup'  
	var els = document.getElementsByTagName("a");  
	for(var i = 0; i < els.length; i++) {
		if (els[i].className.indexOf("popup") !=- 1) {      
			els[i].onclick=popupImage;
		}
	}
}
function popupImage() {
	// load the popup image into a temporary Image structure
	// once its finished loading, open the window with the correct Image dimensions
	// pulled from the Image structure
	var parameterString = this.href.replace(/.*\?(.*)/, "$1");
	var params=parameterString.replace("&", ",");
	var href=this.href.replace("?", "&");
	window.open('/nodeimage/?img='+href,'Orchidea',"toolbar=no,location=no,status=yes,menubar=no,scrollbars=no,resizable=no,"+params).focus();
	return false; 
}
window.onload = initPopups;