function changeImgShowSize(img, name, maxWidth){
		maxWidth = maxWidth ? maxWidth : 560;
		var zoom=parseInt(img.style.zoom,10) || 100;
		zoom += event.wheelDelta / 24;
		imgW = document.getElementById(name).clientWidth*zoom/100;
		if (zoom>10 && imgW < maxWidth) img.style.zoom = zoom + "%";
		return false;
	}

	function inArray(value, arr) {
		var len = arr.length;
		for(var i = 0; i <len; i++) {
			if(value == arr[i]) return true;
		}
		return false;
	}

	function setAllSelectedState(objID, state) {
		objID = document.getElementById(objID);
		if(!objID)	return false;

		for(var i=0; i<objID.length; i++) {
			objID.options[i].selected = state;
		}
	}

	function do_del(url) {

		if(confirm("really want to delete£¿")){
			window.location.href=url;
		}	

	}

	function setDisplay(arr, display) {
		var obj;
		for(var i=0; i<arr.length; i++) {
			obj = document.getElementById(arr[i]);
			if(obj)	obj.style.display = display;
		}
	}


	function menuImgChange(objName, img) {

		var obj;
		obj = document.getElementById(objName);
		if(!obj) return false;
		obj.src = img;
	}
	
	function checkEmail(email)	{
		var reg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/;
		var flag = reg.test(email);
		return flag;
	}