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";
	}
	opacity();
}

function opacity() {
	if (document.getElementsByClassName('image')){
		var oe = document.getElementsByClassName('image');
		for (var i=0; i < oe.length; i++) {
			var el = oe[i].getElementsByTagName('span');
			if (el.length > 0) {
				el[0].setAttribute("style", "opacity:0.7;");
				if (el[0].style.setAttribute) {
					//For IE
					el[0].style.setAttribute("filter", "alpha(opacity=70);");
				}
			}
		}
	}
}

window.onload = externalLinks;