window.onerror = function (errorMessage, scriptURI, lineNumber, columnNumber, errorObj) {
        var context = "错误路径：" + window.location.href + ";\n"
            + "错误信息：" + errorMessage + ";\n"
            + "出错文件：" + scriptURI + ";\n"
            + "出错行号：" + lineNumber + ";\n"
            + "出错列号：" + columnNumber + ";\n"
            + "错误详情：" + errorObj + "。\n";
        //获取到错误之后上传。
    }