function shiftOpacity(id, millisec) {
	var el = document.getElementById(id);
	if (el.style.display == "inline") {
		el.style.display = "none";
	} else {
		el.style.display = "inline";
	}
}

function externalLinks() {
 	 if(!document.getElementsByTagName) return;
 	 var links,a,i;
 	 links = document.getElementsByTagName("a");
 	 for(i=0;i<links.length;i++) {
 	   	 a = links[i];
 	   	 if(a.getAttribute("rel") && a.getAttribute("rel").indexOf("external") > -1) {
 	   	   	 a.onclick = function() {
 	   	   	   	 window.open(this.href);
 	   	   	   	 return false;
}}}}