function HideContentF(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "none";
}
function ShowContentF(d) {
if(d.length < 1) { return; }
var dd = document.getElementById(d);
dd.style.display = "block";
}
function ReverseContentDisplayF(d) {
if(d.length < 1) { return; }
var dd = document.getElementById(d);
if(dd.style.display == "none") { dd.style.display = "block"; }
else { dd.style.display = "none"; }
}
function hide_except(id){
	HideContentF('facebook_content');
	HideContentF('contact_content');
	ShowContentF(id);
	return true;
}