Solved

How to find this value

Posted on 2011-09-12

JavaScript

1 solution

Medium Priority

209 Views

Last Modified: 2012-05-12

Hi experts,

On a webpage there is a drop-down menu that has page numbers like 2, 3, 4. When a user chooses a number, the webpage is supposed to change to that page. However, the script that I have now does not work.

Any help?

Thanks so much.

function submitPage(){

                var box = document.accountreport.pageBox;
                var pgNo = box.options[box.selectedIndex].value;

                document.location.href = "auth_token.htm?pgNo="+ pgNo;
        }

//-----------------------------------------
related part of jsp:

   <form name="accountreport">                            
         <select id="pageBox" name="pageBox" onChange="javascript:submitPage();">
             <c:forEach items="${pages}" var="page" varStatus="loop">
               <option value="<c:out value="${page}"/>" 
                   <c:if test="${page == param.pgNo}">SELECTED</c:if>><c:out value="${page}" />
               </option>
             </c:forEach>

         </select>
    </form>

Open in new window

Comment

Question by:davidw88

[X]

Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

Help others & share knowledge
Earn cash & points
Learn & ask questions

Join The Community

4 Comments

LVL 82

Accepted Solution

by:hielo

hielo earned 1000 total points

ID: 365257282011-09-12

try:

function submitPage(box){
                var pgNo = '';
                if( box.selectedIndex > -1 )
                  box.options[box.selectedIndex].value;

                location.href = "auth_token.htm?pgNo="+ pgNo + "&cb="+(new Date()).valueOf();
        }

//-----------------------------------------
related part of jsp:

   <form name="accountreport">                            
         <select id="pageBox" name="pageBox" onchange="submitPage(this);">
             <c:forEach items="${pages}" var="page" varStatus="loop">
               <option value="<c:out value="${page}"/>" 
                   <c:if test="${page == param.pgNo}">SELECTED</c:if> ><c:out value="${page}" />
               </option>
             </c:forEach>

         </select>
    </form>

If the above does not work, please open your page in a browser and then extract the browser's source code and post it here so we can see the HTML code that your server script is actually generating.

Open in new window

LVL 82

Expert Comment

by:hielo

ID: 365257792011-09-12

>> if( box.selectedIndex > -1 )
>> box.options[box.selectedIndex].value;
Should have been:
if( box.selectedIndex > -1 )
pgNo=box.options[box.selectedIndex].value;

Author Comment

by:davidw88

ID: 365258072011-09-12

Thanks hielo! Your solution works perfect.

I have figured out why my old script did not work. It should be something like this:

var boxObj = document.getElementById('pageBox');
var pgNo = boxObj.options[boxObj.selectedIndex].value;

this works.

Author Comment

by:davidw88

ID: 365258152011-09-12

I added "pgNo=" when I tested your script :)

Should have been:
if( box.selectedIndex > -1 )
pgNo=box.options[box.selectedIndex].value;

Featured Post

Question has a verified solution.

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

Creating linked dropdowns using jQuery and PHP

Article by: Julian

This article discusses how to create an extensible mechanism for linked drop downs.

AJAX form submission with customized server field validation

Article by: Julian

This article discusses how to implement server side field validation and display customized error messages to the client.

Introduction to jQuery (Part 1)

Video by: Jason

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)

Introduction to jQuery (Part 2)

Video by: Jason

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…