`````````````````````````````````````````````````````````````````````````````````````
点击第一个显示第一个
$(document).ready(function() {
    $('.seaon_nr').hide();
    $('.seaon_nr').first().show();
});
$('.seaon .container .box .seaon_nav a').click(function(){
    $('.seaon .container .box .seaon_nav a').removeClass('on');
    $(this).addClass('on');
    let index = $(this).index();
    $('.seaon_nr').hide();
    $(".seaon_nr").eq(index).show();
})
`````````````````````````````````````````````````````````````````````````````````````
显示指定数量的标签
$(document).ready(function() {
  $('div').hide(); // 首先隐藏所有的div元素
  $('div:lt(6)').show(); // 显示前六个div元素
});

`````````````````````````````````````````````````````````````````````````````````````

`````````````````````````````````````````````````````````````````````````````````````
正则匹配 手机
var phoneRegex = /^(?:\+?86)?1[3-9]\d{9}$/; 国内
var phoneRegex = /^\+?[0-9]{1,3}-?[0-9]{3,14}$/; 国际
if (!phoneRegex.test(phone)) {
	layer.msg("请输入正确的手机号");
	return false;
}
`````````````````````````````````````````````````````````````````````````````````````
url改变
history.pushState(state, "", url);

$('.a:eq(1)')
`````````````````````````````````````````````````````````````````````````````````````
删除数组中某个值
var array = [1, 2, 3, 4, 5];
var valueToRemove = 3;

array = $.grep(array, function(element){
  return element !== valueToRemove;
});
`````````````````````````````````````````````````````````````````````````````````````
$(".customizabox-sec1 .cont .fzjut .fz_are1 .item").click(function(){
    $(this).toggleClass("on");
    on = $(".customizabox-sec1 .cont .fzjut .fz_are1 .on");
    all = 0;
    on.each(function() {
        num = $(this).find('.wxk').text();
        all += num*1;
    });
    $(".xk_all").text(all.toFixed(2)); //四舍五入保留小数
});

`````````````````````````````````````````````````````````````````````````````````````
$(".areAlt .bag,.areAlt .bag,.areAlt .cont .f_but .but1,.areAlt .bag,.areAlt .bag,.areAlt .cont .f_but .but2").click(function(){
    var $parentDiv = $(this).closest('.areAlt');

    a = $parentDiv.find('.xkw').val(); 
    b = $parentDiv.find('.xkh').val(); 
    c = $parentDiv.find('.xkm').val(); 
    tm = '/';
    if(b != 0 && b!= ''){
        tm += b+' hours ';
    }
    if(c != 0 &&c != ''){
        tm += c+' minuts ';
    }
    
    title = $(this).parent().parent().parent().data('title')
    $(".f_edit[data-title='" + title + "']").closest('.item').find('.text').html('');
    $(".f_edit[data-title='" + title + "']").closest('.item').find('.text').html('<span class="wxk">'+a+'</span>W'+tm+'/day');
    $(".areAlt[data-title='" + title + "']").fadeOut();
});