4

我是编程新手，所以如果有更好的方法可以做到这一点，我将非常感谢您的建议。我已经搜索了很多小时，但我找不到列表中的第三项依赖于前两项的解决方案。

我的目标是让操作系统选项取决于前两个选择（网络和资源）。有 2 个网络 - 内部和防火墙，如果需要，服务器也可以集群。如果选择标准，则可以选择物理或虚拟。如果选择集群，则唯一的选项是物理的。

我遇到问题的地方是操作系统选择。如果选择防火墙和虚拟的组合，则只有 Linux 和 Windows 可用。如果选择防火墙和物理的组合，则允许使用 AIX、Solaris、Windows 和 Linux。当我单击资源将其更改为物理时，我希望更改操作系统选择。

HTML 代码 

<div class="left_box">
    <body onload="fillCategory();">
<div id ="formWrapper">
<FORM name="drop_list" action="availability.php" method="POST" >
<fieldset>
<label>Network</label>
<SELECT class= "formSelect" NAME="build" onChange="SelectSubCat();" >       
<Option value="">Select Internal or Firewall</option>
</SELECT>
<br>
<br>
<label>Resource</label>
<SELECT class= "formSelect" id="resource" NAME="resource">
<Option value="">Resource</option>
</SELECT>
<br>
<br>
<label>OS</label>
<SELECT class= "formSelect" id="OS" NAME="OS">      
<Option value="">OS</option>
</SELECT>
<br>
<br>
</fieldset>

Javascript代码

function fillCategory(){ 
 // this function is used to fill the category list on load
addOption(document.drop_list.build, "Internal", "Internal", "");
addOption(document.drop_list.build, "Internal Cluster", "Internal Cluster", "");
addOption(document.drop_list.build, "Firewall", "Firewall", "");
addOption(document.drop_list.build, "Firewall Cluster", "Firewall Cluster", "");
}

function SelectSubCat(){
// ON selection of category this function will work
removeAllOptions(document.drop_list.resource);
removeAllOptions(document.drop_list.OS);

if((document.drop_list.build.value == 'Internal')||(document.drop_list.build.value == 'Firewall')){
addOption(document.drop_list.resource,"Virtual", "Virtual","");
addOption(document.drop_list.resource,"Physical", "Physical","");
}

if((document.drop_list.build.value == 'Internal Cluster') || (document.drop_list.build.value     == 'Firewall Cluster')) {
addOption(document.drop_list.resource,"Physical", "Physical");
}

if(document.drop_list.build.value == 'Internal') {
addOption(document.drop_list.OS,"AIX 6.1", "AIX 6.1");
addOption(document.drop_list.OS,"Linux 5.0 (64-bit)", "Linux 5.0 (64-bit)");
addOption(document.drop_list.OS,"Linux 6.0 (64-bit)", "Linux 6.0 (64-bit)");
addOption(document.drop_list.OS,"Solaris 10", "Solaris 10");
addOption(document.drop_list.OS,"Windows 2008 (64-bit) Standard", "Windows 2008 (64-bit) Standard");
addOption(document.drop_list.OS,"Windows 2008 (64-bit) Enterprise", "Windows 2008 (64-bit)   Enterprise");
addOption(document.drop_list.OS,"Windows 2008 R2 (64-bit) Standard", "Windows 2008 R2 (64-bit)  Standard");
addOption(document.drop_list.OS,"Windows 2008 R2 (64-bit) Enterprise", "Windows 2008 R2 (64-bit) Enterprise");
addOption(document.drop_list.OS,"Special", "Special");
}

if((document.drop_list.build.value == 'Internal Cluster') ||(document.drop_list.build.value == 'Firewall Cluster')){
addOption(document.drop_list.OS,"AIX 6.1", "AIX 6.1");
addOption(document.drop_list.OS,"Linux 5.0 (64-bit)", "Linux 5.0 (64-bit)");
addOption(document.drop_list.OS,"Linux 6.0 (64-bit)", "Linux 6.0 (64-bit)");
addOption(document.drop_list.OS,"Solaris 10", "Solaris 10");
addOption(document.drop_list.OS,"Windows 2008 (64-bit) Enterprise", "Windows 2008 (64-bit) Enterprise");
addOption(document.drop_list.OS,"Windows 2008 R2 (64-bit) Enterprise", "Windows 2008 R2 (64-bit) Enterprise");
}

if((document.drop_list.build.value == 'Firewall') && (document.drop_list.resource.value == 'Virtual')) {
addOption(document.drop_list.OS,"Linux 5.0 (64-bit)", "Linux 5.0 (64-bit)");
addOption(document.drop_list.OS,"Linux 6.0 (64-bit)", "Linux 6.0 (64-bit)");
addOption(document.drop_list.OS,"Windows 2008 (64-bit) Enterprise", "Windows 2008 (64-bit) Enterprise");
addOption(document.drop_list.OS,"Windows 2008 R2 (64-bit) Enterprise", "Windows 2008 R2 (64-bit) Enterprise");
}

if((document.drop_list.build.value == 'Firewall') && (document.drop_list.resource.value == 'Physical')) {
addOption(document.drop_list.OS,"AIX 6.1", "AIX 6.1");
addOption(document.drop_list.OS,"Linux 5.0 (64-bit)", "Linux 5.0 (64-bit)");
addOption(document.drop_list.OS,"Linux 6.0 (64-bit)", "Linux 6.0 (64-bit)");
addOption(document.drop_list.OS,"Solaris 10", "Solaris 10");
addOption(document.drop_list.OS,"Windows 2008 (64-bit) Enterprise", "Windows 2008 (64-bit) Enterprise");
addOption(document.drop_list.OS,"Windows 2008 R2 (64-bit) Enterprise", "Windows 2008 R2 (64-bit) Enterprise");
}

} 

////////////////// 

function removeAllOptions(selectbox)
{
    var i;
    for(i=selectbox.options.length-1;i>=0;i--)
{
    //selectbox.options.remove(i);
    selectbox.remove(i);
}
} 


function addOption(selectbox, value, text )
{
var optn = document.createElement("OPTION");
optn.text = text;
optn.value = value;

selectbox.options.add(optn);
}
4

1 回答 1

2

将创建操作系统选项的代码部分移动到另一个函数。在原始函数的末尾调用它。在资源变化时调用新函数。

喜欢：

function selectResource(){
  ...
  selectOS();

}
function selectOS()...

http://jsfiddle.net/7ey8E/1/

于 2012-11-16T18:51:27.843 回答