//设定对象的隐藏与显示－互换
function setdisplay(obName) {
	var ob = document.getElementById(obName);
	if(ob) {
		if(ob.style.display == "none") ob.style.display = "";
		else ob.style.display = "none";
	}
}
//设定对象的隐藏
function hideContent (obname) {
	var ob = document.getElementById(obname);
	if(ob) ob.style.display = "none";
}
//设定对象的显示
function showContent (obname) {
	var ob = document.getElementById(obname);
	if(ob) ob.style.display = "";
}