/*show hidden-field*/
function setVisibility (fieldName, vis) {
	if (document.getElementById(fieldName)) {
		if(vis) {
			document.getElementById(fieldName).style.visibility = "visible";
			document.getElementById(fieldName).style.display = "inline";
		} else {
			document.getElementById(fieldName).style.visibility = "hidden";
			document.getElementById(fieldName).style.display = "none";
		}
	}
}
/*toggle-fieldvisibility*/
function toggleVisibility (fieldName) {
	if (document.getElementById(fieldName)) {
		if(document.getElementById(fieldName).style.visibility == "hidden") {
			setVisibility(fieldName,true);
		} else {
			setVisibility(fieldName,false);
		}
	}
}