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";
			
		}
	}
	return true;
}


function getElementsByClass( tagname, clazz )
{
	var found = new Array();
	var divs = document.getElementsByTagName(tagname);
	for( var i = 0; i < divs.length; i++ ) {
		var div = divs[i];
		if( div.className ) {
			if( div.className == clazz ) {
				found.push( div );
			}
		}
	}
	
	return found;
}

function hideElements( tagname, clazz, self, classes )
{
	if( clazz.length && !clazz.charAt ) {
		for( var i = 0; i < clazz.length; i++ )
		{
			toggleElements( tagname, clazz[i], self, classes, "none" );
		}
	}
	else {
		toggleElements( tagname, clazz, self, classes, "none" );
	}		
}
function showElements( tagname, clazz, self, classes )
{
	if( clazz.length && !clazz.charAt ) {
		for( var i = 0; i < clazz.length; i++ )
		{
			toggleElements( tagname, clazz[i], self, classes, "block" );
		}
	}
	else {
		toggleElements( tagname, clazz, self, classes, "block" );
	}		
}

function toggleElements( tagname, clazz, self, classes, force )
{
	var divs = getElementsByClass( tagname, clazz );
	for( var i = 0; i < divs.length; i++ ) {
		var div = divs[i];
		if( force )
		{
			if( force == "none" ) {
				if(self && classes)	{
					self.className = classes[0];
				}
			}
			if( force == "block" ) {
				if(self && classes)	{
					self.className = classes[1];
				}
			}
			div.style.display = force;
		}
		else {
			if( div.style.display == "none" ) {
				if(self && classes)	{
					self.className = classes[1];
				}
				div.style.display = "block";
			}
			else {
				if(self && classes)	{
					self.className = classes[0];
				}
				div.style.display = "none";
			}
		}
	}
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}