// Show & Hide a DIV layer
function showHideDiv(divname){
	
	if( document.getElementById(divname).style.display == "none")
		document.getElementById(divname).style.display = "block";
	else 
		document.getElementById(divname).style.display = "none";
}

// Show a DIV layer
function showDiv(divname){
	document.getElementById(divname).style.display = "block";
}

// Hide a DIV layer
function hideDiv(divname){
	document.getElementById(divname).style.display = "none";
}

// Hide Facebook Box on click outside of DIV
window.document.onclick=check;
function check(e){
	var target = (e && e.target) || (event && event.srcElement);
	var obj = document.getElementById('facebook');
	if (obj.style.display=='block'){
		checkParent(target)?obj.style.display='none':null;
	}
}
function checkParent(t){
	while(t.parentNode){
		if(t==document.getElementById('facebook')){
			return false
		}
		t=t.parentNode
	}
	return true
}