lib/tethys.js
function(child){
        
        var children = tethys(child);
        
        return this.each(function(el){
            children.each(function(child, i){
                el.appendChild(child);
            });
        });
    }
function(child){
        
        var children = tethys(child);
        
        return this.each(function(el){
            children.each(function(child, i){
                el.appendChild(child);
            });
        });
    }
追加节点