function DisplayOnOff(obj) {
	if(document.all){
		if(document.all(obj).style.display == "block") {
			document.all(obj).style.display = "none";
		}else if(document.all(obj).style.display == "none") {
			document.all(obj).style.display = "block";
		}
	}else if(document.getElementById){
		if(document.getElementById(obj).style.display == "block"){
			document.getElementById(obj).style.display = "none";
		}else if(document.getElementById(obj).style.display == "none"){
			document.getElementById(obj).style.display = "block";
		}
	}
}