function checkAll(input1,input2){
	if($("input:checkbox[@name=chk]")[0].checked == true){
		for(var i=0;i<$(":checkbox").length;i++){
			$("input:checkbox[@name=newsletter]")[i].checked=true;	
		}
	}
	else if($("input:checkbox[@name=chk]")[0].checked == false){
		for(var i=0;i<$(":checkbox").length;i++){
			$("input:checkbox[@name=newsletter]")[i].checked=false;	
		}
	}
}

//close message
function closeMessage(){
	$("#blank").css("display","none");
	$("#message").css("display","none");
}

//array to string
function arrayToString(lists){
	arr=new Array();
	for(var i=0;i<lists.length;i++){
		arr[i]=lists[i].value;
	}
	return arr.join("|");
}

function checkMessageForm(){
	if($.trim($("#email").val())!=""){
		if(/^([a-zA-Z0-9])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/.test($("#email").val())){

		}else{
			alert("Email地址不正确，请输入正确的邮件地址");
			$("#email").focus();
			return false;
		}
	}else{
		alert("请填写您的Email地址");
		$("#email").focus();
		return false;		
	}

	if($.trim($("#title").val())==""){
		alert("请填写留言标题");
		$("#title").focus();
		return false;	
	}
	
	if($.trim($("#content").val())==""){
		alert("请填写留言内容");
		$("#content").focus();
		return false;	
	}
	
	if($.trim($("#checkNumber").val())==""){
		alert("请填写验证码");
		$("#checkNumber").focus();
		return false;	
	}		
}
//exhibitor register
function checkExbRegisterForm(){
	if($.trim($("#name").val())==""){
		alert("请填写您的姓名");
		$("#name").focus();
		return false;	
	}
	if($.trim($("#company").val())==""){
		alert("请填写您的公司名称");
		$("#company").focus();
		return false;	
	}
	if($.trim($("#telephone").val())==""){
		alert("请填写您的电话号码");
		$("#telephone").focus();
		return false;	
	}
	
	if($.trim($("#email").val())!=""){
		if(/^([a-zA-Z0-9])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/.test($("#email").val())){

		}else{
			alert("Email地址不正确，请输入正确的邮件地址");
			$("#email").focus();
			return false;
		}
	}else{
		alert("请填写您的Email地址");
		$("#email").focus();
		return false;		
	}

	if($.trim($("#checkNumber").val())==""){
		alert("请填写验证码");
		$("#checkNumber").focus();
		return false;	
	}		
}

function emailToUsername(){
	$("#username").val($.trim($("#email").val()));
}

//refresh code
/*
function refreshCode(){   
	var imgSrc = $("#checkNumberImg");
	var src = imgSrc.attr("src");
	imgSrc.attr("src",chgUrl(src));
}   

function chgUrl(url){
	var timestamp = (new Date()).valueOf();
	url = url.substring(0,17);
	if((url.indexOf("&")>=0)){
		url = url + "×tamp=" + timestamp;
	}else{
		url = url + "?timestamp=" + timestamp;
	}
	return url;
}
*/
	function refreshCode(){
		var imgSrc = document.getElementById("checkNumberImg");
		var src = imgSrc.getAttribute("src");
		imgSrc.setAttribute("src",chgUrl(src));
	}   

	function chgUrl(url){
		var timestamp = (new Date()).valueOf();
		url = url + "?timestamp=" + timestamp;
		return url;
	}