whole_func_string: function(options){
        var ELEM = 'layui-fixbar', TOP_BAR = 'layui-fixbar-top'
        ,dom = $(document), body = $('body')
        ,is, timer;
  
        options = $.extend({
          showHeight: 200 //出现TOP的滚动条高度临界值
        }, options);
        
        options.bar1 = options.bar1 === true ? '&#xe606;' : options.bar1;
        options.bar2 = options.bar2 === true ? '&#xe607;' : options.bar2;
        options.bgcolor = options.bgcolor ? ('background-color:' + options.bgcolor) : '';
        
        var icon = [options.bar1, options.bar2, '&#xe604;'] //图标：信息、问号、TOP
        ,elem = $(['<ul class="'+ ELEM +'">'
          ,options.bar1 ? '<li class="layui-icon" lay-type="bar1" style="'+ options.bgcolor +'">'+ icon[0] +'</li>' : ''
          ,options.bar2 ? '<li class="layui-icon" lay-type="bar2" style="'+ options.bgcolor +'">'+ icon[1] +'</li>' : ''
          ,'<li class="layui-icon '+ TOP_BAR +'" lay-type="top" style="'+ options.bgcolor +'">'+ icon[2] +'</li>'
        ,'</ul>'].join(''))
        ,topBar = elem.find('.'+TOP_BAR)
        ,scroll = function(){
          var stop = dom.scrollTop();
          if(stop >= (options.showHeight)){
            is || (topBar.show(), is = 1);
          } else {
            is && (topBar.hide(), is = 0);
          }
        };
        if($('.'+ ELEM)[0]) return;
        
        typeof options.css === 'object' && elem.css(options.css);
        body.append(elem), scroll();
        
        //bar点击事件
        elem.find('li').on('click', function(){
          var othis = $(this), type = othis.attr('lay-type');
          if(type === 'top'){
            $('html,body').animate({
              scrollTop : 0
            }, 200);
          }
          options.click && options.click.call(this, type);
        });
        
        //Top显示控制
        dom.on('scroll', function(){
          clearTimeout(timer);
          timer = setTimeout(function(){
            scroll();
          }, 100);
        }); 
      }
func_code_string: function(options){
        var ELEM = 'layui-fixbar', TOP_BAR = 'layui-fixbar-top'
        ,dom = $(document), body = $('body')
        ,is, timer;
  
        options = $.extend({
          showHeight: 200 //出现TOP的滚动条高度临界值
        }, options);
        
        options.bar1 = options.bar1 === true ? '&#xe606;' : options.bar1;
        options.bar2 = options.bar2 === true ? '&#xe607;' : options.bar2;
        options.bgcolor = options.bgcolor ? ('background-color:' + options.bgcolor) : '';
        
        var icon = [options.bar1, options.bar2, '&#xe604;'] //图标：信息、问号、TOP
        ,elem = $(['<ul class="'+ ELEM +'">'
          ,options.bar1 ? '<li class="layui-icon" lay-type="bar1" style="'+ options.bgcolor +'">'+ icon[0] +'</li>' : ''
          ,options.bar2 ? '<li class="layui-icon" lay-type="bar2" style="'+ options.bgcolor +'">'+ icon[1] +'</li>' : ''
          ,'<li class="layui-icon '+ TOP_BAR +'" lay-type="top" style="'+ options.bgcolor +'">'+ icon[2] +'</li>'
        ,'</ul>'].join(''))
        ,topBar = elem.find('.'+TOP_BAR)
        ,scroll = function(){
          var stop = dom.scrollTop();
          if(stop >= (options.showHeight)){
            is || (topBar.show(), is = 1);
          } else {
            is && (topBar.hide(), is = 0);
          }
        };
        if($('.'+ ELEM)[0]) return;
        
        typeof options.css === 'object' && elem.css(options.css);
        body.append(elem), scroll();
        
        //bar点击事件
        elem.find('li').on('click', function(){
          var othis = $(this), type = othis.attr('lay-type');
          if(type === 'top'){
            $('html,body').animate({
              scrollTop : 0
            }, 200);
          }
          options.click && options.click.call(this, type);
        });
        
        //Top显示控制
        dom.on('scroll', function(){
          clearTimeout(timer);
          timer = setTimeout(function(){
            scroll();
          }, 100);
        }); 
      }
func_documentation_string: 固定块