语句

 //if语句
        //迭代语句
        //for
        //do{} while()
        //while
        //for in
        var i = new Number(1);
        for (sProp in window) {
            document.writeln(i.toString() + "、 " + sProp + "<br />");
            i++;
        }
        //有标签的语句
        //break 语句和continue语句