function loadtab(tab) {
	if(tab == "facebook") {
		$('box_facebook').style.display = "block";
		$('box_twitter').style.display = "none";
		$('link_facebook').className = "facebook";
		$('link_twitter').className = "twitter unselected";
	}
	if(tab == "twitter") {
		$('box_facebook').style.display = "none";
		$('box_twitter').style.display = "block";
		$('link_facebook').className = "facebook unselected";
		$('link_twitter').className = "twitter";
	}
}