function extern(obj) {
	obj.target = '_blank';
}


function toggle(id) {
	var myElement=document.getElementById(id);
	if(myElement != null) {
		var actualVisibility = myElement.style.visibility;
		if(actualVisibility=='' || actualVisibility=='visible') {
			document.getElementById(id).style.visibility = "hidden";
			document.getElementById(id).style.display = "none";
		} else {
			document.getElementById(id).style.visibility = "visible";
			document.getElementById(id).style.display = "";
		}
	}
}