小编Siv*_*va 的帖子

<select onchange="test()" id="select_id">
    <option value="0">-Select-</option>
    <option value="1">Communication</option>
</select>

我需要在javascript中获取所选选项的值:有没有人知道如何获取所选值或文本,请告诉我们如何为它编写函数.我已经分配了onchange()函数来选择那么我之后做了什么？

能否请您详细解释使用"标准表","哈希表"或简称"表"之间的区别."初始大小0"的含义是什么？

如需参考,请查看以下代码..

it_c01_d006_raw TYPE STANDARD TABLE OF /bic/ac01_d00600
                       INITIAL SIZE 0,
it_c01_d006     TYPE HASHED TABLE OF /bic/ac01_d00600
                       WITH UNIQUE KEY /bic/cemployee /bic/cdatetype,
it_c01_d002     TYPE TABLE OF /bic/ac01_d00200.

            <div id="selected_options">
            <select onchange="test()" id="selected_options">
            <option value="0" selected>-Select-</option>
            <option value="1">Communication</option>
            <option value="2">Hardware</option>
            </select>
    </div>

我已经为选定的值编写了一个函数,但是当我对所选值进行警报时,它显示为undefined,函数是

      function test() {
                    var get_id = document.getElementById('selected_options');
                    var result = get_id.options[get_id.selectedIndex].value;
                    alert(result);
                      }

任何人请告诉我这是什么错误？

我是新手,请让我知道,使用ceil和floor功能.

嗨我在我的网页上做评论框,以便我通过不允许用户输入空注释来对该评论框进行验证,并且评论sholud不大于255个字符它一切正常但是当我输入评论时这意味着

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaakjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

这个字符串溢出了注释框div,即它就像一条直线,我用过css属性overflow:auto; 但我需要的是它应该像这样显示.它应该拆分字符串

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaakjjjjjjjjj
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

对于前:当我这样评论 The p element has both line boxes and a child box for the q element, which is a block-level element. The line boxes before the q are wrapped in an anonymous block-level box and so are the line boxes after the q. The resulting tree of boxes might be as fol

它恰到好处...它应该是这样的

我有一个字段'title_medi'的表,其中包含两行,如"Mr."和"Ms."我有一个名为title的输入字段,带有title_medi的搜索帮助.当我在搜索帮助中选择"先生"时.它会显示在文本字段中.

如果我将该文本字段值与数据库字段进行比较.我收到了一个错误.

但是,当我调试并看到值有点被转换为全部大写,如"MR.",而不是完全在表中.

你能帮我解决这个问题吗？