function $id(id) {
	return document.getElementById(id);
}

document.getElementsByClassName = function(className,oBox) {
	//适用于获取某个HTML区块内部含有某一特定className的所有HTML元素
	this.d= oBox || document;
	var children = this.d.getElementsByTagName('*') || document.all;
	var elements = new Array();
	for (var ii = 0; ii < children.length; ii++) {
		var child = children[ii];
		var classNames = child.className.split(' ');
		for (var j = 0; j < classNames.length; j++) {
			if (classNames[j] == className) {
			elements.push(child);
			break;
			}
		}
	}
	return elements;
}


function showDiv(id){
	$id(id).style.display="block";
}
function closeDiv(id){
    $id(id).style.display="none";
}
function setInline(id){
    $id(id).style.display="inline";
}

function clearTab(id){
	var tabArr = $id(id).getElementsByTagName("A");
	for(var i = 0;i < tabArr.length;i++){
		tabArr[i].className = "";
	}
}

function toggle(id){
	if ($id(id).style.display=="block"){
		$id(id).style.display="none";
	} else {
		$id(id).style.display="block";
	}
}