自定义alert框

<script>

         function alerts(data, callback) { //回调函数
             var alert_bg = document.createElement(\'div\');
             alert_box = document.createElement(\'div\'),
                 alert_text = document.createElement(\'div\'),
                 alert_btn = document.createElement(\'div\'),
                 textNode = document.createTextNode(data ? data : \'\'),
                 btnText = document.createTextNode(\'确 定\');

             // 控制样式
             css(alert_bg, {
                 \'position\': \'fixed\',
                 \'top\': \'0\',
                 \'left\': \'0\',
                 \'right\': \'0\',
                 \'bottom\': \'0\',
                 \'background-color\': \'rgba(0, 0, 0, 0.1)\',
                 \'z-index\': \'999999999\'
             });

             css(alert_box, {
                 \'width\': \'540px\',
                 \'max-width\': \'90%\',
                 \'font-size\': \'23px\',
                 \'text-align\': \'center\',
                 \'background-color\': \'#fff\',
                 \'border-radius\': \'15px\',
                 \'position\': \'absolute\',
                 \'top\': \'50%\',
                 \'left\': \'50%\',
                 \'transform\': \'translate(-50%, -50%)\'
             });

             css(alert_text, {
                 \'padding\': \'10px 15px\',
                 \'border-bottom\': \'1px solid #ddd\'
             });

             css(alert_btn, {
                 \'padding\': \'10px 0\',
                 \'color\': \'#007aff\',
                 \'font-weight\': \'600\',
                 \'cursor\': \'pointer\'
             });

             // 内部结构套入
             alert_text.appendChild(textNode);
             alert_btn.appendChild(btnText);
             alert_box.appendChild(alert_text);
             alert_box.appendChild(alert_btn);
             alert_bg.appendChild(alert_box);

             // 整体显示到页面内
             document.getElementsByTagName(\'body\')[0].appendChild(alert_bg);

             // 确定绑定点击事件删除标签
             alert_btn.onclick = function() {
                 window.location.reload();
                 alert_bg.parentNode.removeChild(alert_bg);
                 if (typeof callback === \'function\') {
                     callback(); //回调
                 }
             }
         }

         function css(targetObj, cssObj) {
             var str = targetObj.getAttribute("style") ? targetObj.getAttribute(\'style\') : \'\';
             for (var i in cssObj) {
                 str += i + \':\' + cssObj[i] + \';\';
             }
             targetObj.style.cssText = str;
         }


     </script>