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 expandCollapse() {
	for (var i=0; i<expandCollapse.arguments.length; i++) {
		var element = document.getElementById(expandCollapse.arguments[i]);
		if (i == 0)
		    element.style.display = "block";
		else
		    element.style.display = "none";
	}
}