Solved

Visibility of Dynamic Drop Down List

Posted on 2006-10-24
1
229 Views
Last Modified: 2011-09-20
I need to code for a dependant dynamic drop down list ...  ;)

What I would like to do is, based on user selection from the first Category box, to either display further options or hide the SubCat drop down list.  

document.drop_list.SubCat.disabled=true;  --works just fine to disable but it does not hide from screen.  Any comments would be aprpeciated!!  Below is the code.

Thanks!


========================================

<!--dyn_dropdownlist.js-->

function fillCategory(){
 // this function is used to fill the category list on load


addOption(document.drop_list.Category, "City/County/State", "City/County/State", "");
addOption(document.drop_list.Category, "Contractor", "Contractor", "");
addOption(document.drop_list.Category, "Federal Military", "Federal Military", "");
addOption(document.drop_list.Category, "Golf Course", "Golf Course", "");
addOption(document.drop_list.Category, "Nursery or Tree Growing", "Nursery or Tree Growing", "");
addOption(document.drop_list.Category, "Rental Center", "Rental Center", "");
addOption(document.drop_list.Category, "Utility Company", "Utility Company", "");


}

function SelectSubCat(){
// ON selection of category this function will work

removeAllOptions(document.drop_list.SubCat);
addOption(document.drop_list.SubCat, "", "SubCat", "");



if(document.drop_list.Category.value == 'City/County/State'){
addOption(document.drop_list.SubCat,"Electric", "Electric");
addOption(document.drop_list.SubCat,"Highway Department", "Highway Department");
addOption(document.drop_list.SubCat,"Landfill", "Landfill");
addOption(document.drop_list.SubCat,"Streets and Sanitation", "Streets and Sanitation");
addOption(document.drop_list.SubCat,"Parks and Recreation", "Parks and Recreation");
addOption(document.drop_list.SubCat,"Water/Sewer", "Water/Sewer");
addOption(document.drop_list.SubCat,"Other", "Other");



}

if(document.drop_list.Category.value == 'Contractor'){
addOption(document.drop_list.SubCat,"Boring", "Boring");
addOption(document.drop_list.SubCat,"CATV", "CATV");
addOption(document.drop_list.SubCat,"Electric", "Electric");
addOption(document.drop_list.SubCat,"General Construction", "General Construction");
addOption(document.drop_list.SubCat,"General Trenching", "General Trenching");
addOption(document.drop_list.SubCat,"Golf Course Construction", "Golf Course Construction");
addOption(document.drop_list.SubCat,"Irrigation", "Irrigation");
addOption(document.drop_list.SubCat,"Land Cleaning", "Land Cleaning");
addOption(document.drop_list.SubCat,"Landscaping", "Landscaping");
addOption(document.drop_list.SubCat,"Pipeline", "Pipeline");
addOption(document.drop_list.SubCat,"Roads", "Roads");
addOption(document.drop_list.SubCat,"Telephone", "Telephone");
addOption(document.drop_list.SubCat,"Tree Service", "Tree Service");
addOption(document.drop_list.SubCat,"Waste Processing/Landfill", "Waste Processing/Landfill");
addOption(document.drop_list.SubCat,"Water/Sewer", "Water/Sewer");
addOption(document.drop_list.SubCat,"Other", "Other");

}

if(document.drop_list.Category.value == 'Federal Military'){
addOption(document.drop_list.SubCat," ", " ");
addOption(document.drop_list.SubCat," ", " ");
addOption(document.drop_list.SubCat," ", " ");
}

if(document.drop_list.Category.value == 'Golf Course'){
addOption(document.drop_list.SubCat," ", " ");
addOption(document.drop_list.SubCat," ", " ");
addOption(document.drop_list.SubCat," ", " ");
}

if(document.drop_list.Category.value == 'Nursery or Tree Growing'){
addOption(document.drop_list.SubCat," ", " ");
addOption(document.drop_list.SubCat," ", " ");
addOption(document.drop_list.SubCat," ", " ");
}

if(document.drop_list.Category.value == 'Rental Center'){
//addOption(document.drop_list.SubCat," ", " ");
//addOption(document.drop_list.SubCat," ", " ");
//addOption(document.drop_list.SubCat," ", " ");
//document.drop_list.SubCat.disabled=true;
document.drop_list.SubCat.display="none";
}

if(document.drop_list.Category.value == 'Utility Company'){
addOption(document.drop_list.SubCat,"Boring", "Boring");
addOption(document.drop_list.SubCat,"CATV", "CATV");
addOption(document.drop_list.SubCat,"Electric", "Electric");
addOption(document.drop_list.SubCat,"General Construction", "General Construction");
addOption(document.drop_list.SubCat,"General Trenching", "General Trenching");
addOption(document.drop_list.SubCat,"Golf Course Construction", "Golf Course Construction");
addOption(document.drop_list.SubCat,"Irrigation", "Irrigation");
addOption(document.drop_list.SubCat,"Land Cleaning", "Land Cleaning");
addOption(document.drop_list.SubCat,"Landscaping", "Landscaping");
addOption(document.drop_list.SubCat,"Pipeline", "Pipeline");
addOption(document.drop_list.SubCat,"Roads", "Roads");
addOption(document.drop_list.SubCat,"Telephone", "Telephone");
addOption(document.drop_list.SubCat,"Tree Service", "Tree Service");
addOption(document.drop_list.SubCat,"Waste Processing/Landfill", "Waste Processing/Landfill");
addOption(document.drop_list.SubCat,"Water/Sewer", "Water/Sewer");
addOption(document.drop_list.SubCat,"Other", "Other");
}




}
//////////////////

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);
}


========================================


<!--HTML CODE-->



<html>
<head>
<title>dynamic drop down list</title>
<script language="javascript" src="dyn_dropdownlist.js"></script>
</head>

<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#800080" alink="#ff0000" onload="fillCategory();">

<FORM name="drop_list" action="" method="POST" >
Customer Type:            
<SELECT  NAME="Category" onChange="SelectSubCat();" >
<Option value="">Category</option>
<!--<OPTION VALUE="City/County/State"> City/County/State
<OPTION VALUE="Contractor"> Contractor
<OPTION VALUE="Federal Military"> Federal Military
<OPTION VALUE="Golf Course"> Golf Course
<OPTION VALUE="Nursery or Tree Growing"> Nursery or Tree Growing
<OPTION VALUE="Rental Center"> Rental Center
<OPTION VALUE="Utility Company"> Utility Company-->
</SELECT>&nbsp;

<SELECT id="SubCat" NAME="SubCat">
<Option value="">SubCat</option>

</SELECT>
</form>

</body>

</html>
0
Comment
Question by:Chip
1 Comment
 
LVL 5

Accepted Solution

by:
daohailam earned 50 total points
ID: 17797370
to hide:
  document.drop_list.style.display = 'none';
  document.drop_list.style.visibility = 'hidden';

to show:
  document.drop_list.style.display = '';
  document.drop_list.style.visibility = 'visible';
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
This article discusses how to create an extensible mechanism for linked drop downs.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question