// ======================================
// _blank External Links
// ======================================

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;



// ======================================
// toggle link blocks
// ======================================

function toggleSection(key) {

	var section = document.getElementById(key);
	if( section.style.display == 'none' ) {
		section.style.display = '';

		swap("plusminus" + key,"minus");
	}
	else {
		section.style.display = 'none';
		swap("plusminus" + key,"plus");
	}
	return false;
}

plus = new Image;
plus.src = "imgs/icons/plus.gif";
minus = new Image;
minus.src = "imgs/icons/minus.gif";

function swap(x, y) {
	document.images[x].src=eval(y+'.src');
}