function externalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a"); 
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i]; 
			if (anchor.getAttribute("href") && 
				anchor.getAttribute("rel") == "cvv") 
				anchor.href="javascript:CvvExplanation();";
				
	}
} 
window.onload = externalLinks;

function CvvExplanation(){
	window.open('cvv.html','ChargeWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,copyhistory=no,scrollbars=no,width=500,height=306');
}