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") == "external")
     	anchor.target = "_blank";
 		}
	}

window.onload = externalLinks;

function popupBooking(theURL) {
	window.open(theURL, 'popupBooking', 'width=750, height=500, top=100, left=100, scrollbars=yes, status=yes');
}