string.prototype.trim = function () {
	return this.replace(/^\s\s*/, '' ).replace(/\s\s*$/, '' );
}
function change_menu_bg(i){
	document.getelementbyid('menu_'+i).style.background = '#019be1';
}

function change_tab(str,id,total){
	for(i = 1; i <= total; i++){
		document.getelementbyid(str + i).style.display = 'none';
	}
	document.getelementbyid(str + (parseint(id) + 1)).style.display = 'block';
	for(i=0; i < total; i++){
		document.getelementbyid("class_title_" + i).style.bordertop = 'none';
		document.getelementbyid("class_title_" + i).style.background = 'none';
		document.getelementbyid("class_title_" + i).style.color = '#999';
	}
	document.getelementbyid("class_title_" + id).style.bordertop = '2px solid #ff6100';
	document.getelementbyid("class_title_" + id).style.color = '#333';
	document.getelementbyid("class_title_" + id).style.background = '#ffffff';
}

//客户端判断
function check_agent() {
    var useragentinfo = navigator.useragent;
    var agents = ["android", "iphone", "symbianos", "windows phone", "ipad", "ipod"];
    var flag = 'pc';
    for (var v = 0; v < agents.length; v++) {
        if (useragentinfo.indexof(agents[v]) > 0) {
            flag = 'mobile';
			return flag;
            break;
        }
    }
    return flag;
}

//banner切换(三个参数分别为图片地址、宽度、高度。其中图片地址为字符串，用‘|’把单个图片地址连接起来形成的字符串。)
function banner_flash( imgurl_str, width, height){
	if(imgurl_str.substr(imgurl_str.length-1,1)=='|'){
		imgurl_str = imgurl_str.substr(0,imgurl_str.length-1);
	}
	if(width == '100%'){
		width = document.body.clientwidth;
	}

	var focus_width = width;
	var focus_height = height;
	var text_height = 0;
	var swf_height = focus_height + text_height;

	var pics = imgurl_str;
	var links = '';
	var texts = '';

	var flashcode = '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/hotdeploy/flash/swflash.cab#version=6,0,0,0" width="'+ focus_width +'" height="'+ swf_height +'">';

	flashcode = flashcode + '<param name="allowscriptaccess" value="samedomain"><param name="movie" value="images/banner.swf"><param name="quality" value="high"><param name="bgcolor" value="#f0f0f0">';

	flashcode = flashcode + '<param name="menu" value="false"><param name=wmode value="transparent">';

	flashcode = flashcode + '<param name="flashvars" value="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'">';

	flashcode = flashcode + '<embed wmode="opaque" src="images/banner.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="'+ focus_width +'" height="'+ swf_height +'" flashvars="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'" wmode="transparent"></embed>';

	flashcode = flashcode + '</object>';

	document.write(flashcode);
}

//表单必填项检查
function check_notnull(id_str,lang){
	id_array = id_str.split(',');
	for( i = 0; i < id_array.length; i++ ){
		var str = document.getelementbyid(id_array[i]).value;
		if(str==""){
			if(lang == '_2'){
				alert("submit failure required (red * flag) cannot be empty.");
			}else{
				alert("提交失败，必填项（带 * 标志的）不能为空。");
			}
			document.getelementbyid(id_array[i]).focus();
			return false;
		}
	}
	return true;
}

//图片重绘
function imagesizeauto(imageobj,iwidth,iheight){    
	//参数(图片,允许的宽度,允许的高度)    
	var image = new image();
	var w, h;
	image.onload = function(){
		if(image.width>0 && image.height>0){    
			if(image.width/image.height >= iwidth/iheight){    
				if(image.width > iwidth){      
					imageobj.style.width = iwidth + 'px';
					h = (image.height*iwidth)/image.width;
					imageobj.style.height = h + 'px';
				}else{
					imageobj.style.width=image.width + 'px';
					h = image.height;
					imageobj.style.height=h + 'px';
				}
				var mtop = math.ceil((iheight - h)/2);
				imageobj.style.margin = '0 auto';
				imageobj.style.margintop = mtop + 'px';
			}else{    
				if(image.height > iheight){      
					imageobj.style.height=iheight + 'px';
					w = (image.width*iheight)/image.height;
					imageobj.style.width=w + 'px';
					imageobj.style.margin = 'auto';
				}else{
					h = image.height;
					imageobj.style.width=image.width + 'px';
					imageobj.style.height=h + 'px';
					imageobj.style.margin = 'auto';
					var mtop = math.ceil((iheight - h)/2);
					imageobj.style.margintop = mtop + 'px';
				}
			}    
		}
	}
	image.src = imageobj.src;
}
//图片重绘
function imagesizeauto2(imageobj,iwidth,iheight){    
    //参数(图片,允许的宽度,允许的高度)    
    var image = new image();    
    image.onload = function(){
		if(image.width>0 && image.height>0){    
			if(image.width/image.height >= iwidth/iheight){
				imageobj.style.height = iheight + 'px';    
				imageobj.style.width = (image.width * iheight)/image.height + 'px';
				var mleft = math.ceil((iwidth - (image.width * iheight)/image.height)/2);
				imageobj.style.margin = '0';
				imageobj.style.marginleft = mleft + 'px';
			}else{
				imageobj.style.width = iwidth + 'px';    
				imageobj.style.height = (image.height * iwidth)/image.width + 'px';
				var mtop = math.ceil((iheight - (image.height * iwidth)/image.width)/2);
				imageobj.style.margin = '0';
				imageobj.style.margintop = mtop + 'px';
			}    
		}
	}
	image.src = imageobj.src;
}

//图片自动缩小(主要用于产品展示页(pro_content.php)和图片展示页(pic_content.php))
function imagechangewidth(imageobj,widthvalue){
	var img = new image();
	img.onload = function(){
		var w = img.width;
		var h = img.height;
		var rate = 1;
		if(img.width > 0 && img.height > 0){
			if(w > widthvalue){
				rate = w/widthvalue;
				w = widthvalue;
				h = h/rate;
			}
			imageobj.style.width = w + 'px';
			imageobj.style.height = h + 'px';
		}
	}
	img.src = imageobj.src;
}

//在线留言表单
function check_post(){
	var not_num_result = check_notnull('name,mobile,title,message_content,code');
	if(!not_num_result){return not_num_result;}
	//姓名必须为汉字
	var str = document.getelementbyid("name").value;
	var result = checkchinese(str);
	if(!result){
		alert("姓名必须为汉字");
		return false;
	}
	//联系方式是否正确
	var str = document.getelementbyid("mobile").value;
	var result_tel = checktel(str);
	var result_mobile = checkmobile(str);
	if(!result_tel && !result_mobile){
		alert("联系方式不正确，请填写11位手机号码或者带区号的固定电话号码");
		return false;
	}
	//验证码是否为数字
	var str = document.getelementbyid("code").value;
	var result = checknum(str);
	if(!result){
		alert("验证码必须为数字");
		return false;
	}	
	return true;
}

//========================================================================================
//是否全为汉字检查
/*正则表达式判断法
function checkchinese(str){
	var reg = new regexp("[\\u4e00-\\u9fff]+","g");
	return reg.test(str);
}
*/
//unicode 判断法
function checkchinese(str){
	for(i=0; i<str.length; i++){
		if(str.charcodeat(i) <= 255){
			return false;
		}
	}
	return true;
}
//是否含有汉字
function checkhavechinese(str){
	for(i=0; i<str.length; i++){
		if(str.charcodeat(i) > 255){
			return true;
		}else{
			return false;
		}
	}
}


//是否为数字检查
function checknum(str){
	var reg = /^[0-9]*$/;
	var flag = reg.test(str);
	if(!flag){
		return false;
	}else{
		return true;
	}
}


/*判断ip的函数*/
function checkip(str){
	var pattern=/^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$/;
	var flag_ip=pattern.test(str);
	if(!flag_ip){  
		return false;
	}else{
		return true;
	}
}

/*判断域名的函数*/
function checkdomain(str){
	var doname = /^([\w-]+\.)+((com)|(net)|(org)|(gov\.cn)|(info)|(cc)|(com\.cn)|(net\.cn)|(org\.cn)|(name)|(biz)|(tv)|(cn)|(mobi)|(name)|(sh)|(ac)|   (io)|(tw)|(com\.tw)|(hk)|(com\.hk)|(ws)|(travel)|(us)|(tm)|(la)|(me\.uk)|(org\.uk)|(ltd\.uk)|(plc\.uk)|(in)|(eu)|(it)|(jp))$/;
	var flag_domain = doname.test(str);
	if(!flag_domain){
		return false;
	}else{
		return true;
	}
}

//判断是否为电话号码
function checktel(str){
	var reg = /^0[\d]{2,3}-[\d]{7,8}$/;
	var flag = reg.test(str);
	if(!flag){
		return false;
	}else{
		return true;
	}
}

//判断手机号码是否正确
function checkmobile(str){
	var reg = /^1[3,5,8]\d{9}$/;
	var flag = reg.test(str);
	if(!flag){
		return false;
	}else{
		return true;
	}
}

//关闭窗口
function closecurrentpage(){
	if (navigator.useragent.indexof("msie") > 0) {
		if (navigator.useragent.indexof("msie 6.0") > 0) {
			window.opener = null;
			window.close();
		} else {
			window.open('', '_top');
			window.top.close();
		}
	}else if (navigator.useragent.indexof("firefox") > 0) {
		window.close();
	} else {
		window.opener = null;
		window.open('', '_self', '');
		window.close();
	}
}

//加入购物车
function add_to_cart(id, name, icon){
	var ajax;
	if(window.xmlhttprequest){
		ajax = new xmlhttprequest();
	}else{
		ajax = new activexobject("microsoft.xmlhttp");
	}
	ajax.onreadystatechange = function(){
		if(ajax.readystate == 4 && ajax.status == 200){
			alert(ajax.responsetext);
		}
	}
	var url = 'simple_cart.php?action=add&infoid=' + id + '&name=' + name + '&icon=' + icon;
	ajax.open('get',url);
	ajax.send();
}
//移出购物车
function remove_from_cart(id){
	var ajax;
	if(window.xmlhttprequest){
		ajax = new xmlhttprequest();
	}else{
		ajax = new activexobject('microsoft.xmlhttp');
	}
	ajax.onreadystatechange = function(){
		if(ajax.readystate == 4 && ajax.status == 200){
			alert(ajax.responsetext);
			document.getelementbyid('line_' + id).style.display = 'none';
		}
	}
	var url = 'simple_cart.php?action=delete&infoid=' + id;
	ajax.open('get',url);
	ajax.send();
}