how to pass query string when user click on hyperlink text

Hi,

In my JSP page i have hyper text link. Below that link i will have 3 radio buttons. When user click on the hyper link i want pass the value of selected radio button as a query sting with the URL i mention at <a href="url"> tag.

Here is my code but it's not working, i am getting envType value as null

<BODY>
<%
    String envtype = request.getParameter("envType");
%>
<TABLE width=600 BORDER=0>

<TR>
      <TD><a href="/iaInformation/index.do?envType=<%=envtype%>" ><bean:message key="mwr.link.msg.whows.rpt" /></a></TD>
</TR>

<TR>
    <TD class='normal'><input TYPE="radio" NAME="envType" VALUE="T" checked>Test Environment (T01, T02, T03, T04)</TD>
</TR>
<TR>
    <TD class='normal'><input TYPE="radio" NAME="envType" VALUE="Q" >QA Environment (Q01)</TD>
</TR>
<TR>
    <TD class='normal'><input TYPE="radio" NAME="envType" VALUE="P" >Production Environment (P01)</TD>
</TR>
</TABLE>

</BODY>

Please correct me if i am doing wrong.
I appreciate ur help!

Thanks
mvkrajuAsked:
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rrzConnect With a Mentor Commented:
Wow! The javascript turned out more complicated than I thought. Since you are using  Struts (as suggested by "princeamin" in his post), maybe this should be done at the server ?  Anyway the javascript was just an idea. Here is what works for me.   rrz

<html>
<head>
<script>
      function addData(){
           var envType = "T";
           if(document.index.envType[1].checked)envType = document.index.envType[1].value;
           if(document.index.envType[2].checked)envType = document.index.envType[2].value;
           document.links[0].href = "/iaInformation/index.do?envType=" + envType;
      }
</script>
</head>
<body>
<a href="#" onclick="addData();" >
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rrzCommented:
You could use a HTML form to submit data to server. Or maybe you could use JavaScript to create the URL.

>Please correct me if i am doing wrong.  
You are trying to use JSP on the client side.  JSP is at the server and JavaScript is in the browser.
rrz
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princeaminCommented:
For this to work, you need to have /iaInformation/index.do defined in your struts config and working.

<BODY>
<%
    String envtype = request.getParameter("envType");
%>
<TABLE width=600 BORDER=0>
<html:form action="/iaInformation/index.do" method="GET" >
<TR>
     <TD>
<bean:message key="mwr.link.msg.whows.rpt" /></a></TD>
</TR>

<TR>
    <TD class='normal'><input TYPE="radio" NAME="envType" VALUE="T" checked>Test Environment (T01, T02, T03, T04)</TD>
</TR>
<TR>
    <TD class='normal'><input TYPE="radio" NAME="envType" VALUE="Q" >QA Environment (Q01)</TD>
</TR>
<TR>
    <TD class='normal'><input TYPE="radio" NAME="envType" VALUE="P" >Production Environment (P01)</TD>
</TR>
</TABLE>
</html:form>
</BODY
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mvkrajuAuthor Commented:
In my example i mentioned only one hyperlink. But actually i have 2 hyperlinks, for the 2 URLs i want to pass this query string.

princeamin, in that case how does it work?
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mvkrajuAuthor Commented:
If it is not possible this way.
Can i do it using javascript?
but i have no idea how to assign a value  which i get it from JS?

Please give me some suggestions!!!

Thanks
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mvkrajuAuthor Commented:
I am increasing points, if it is difficult.
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rrzCommented:
instead of
><a href="/iaInformation/index.do?envType=<%=envtype%>" ><bean:message key="mwr.link.msg.whows.rpt" /></a>
you could use something like  
><a href="#" onclick="this.href = '/iaInformation/index.do?envType=' + document.formname.envType.value;"><bean:message key="mwr.link.msg.whows.rpt" /></a>  
I did not check my javascript code. You might have change the way I access envType's value.  rrz
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mvkrajuAuthor Commented:
rrz
when i print the envType value in the servlet.
it prints envType value as 'undefined'.
am i mising anything else?
i did exactly as you said.
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mvkrajuAuthor Commented:
rrz... i could see the follwong URL in my browser
http://localhost:9080/iaInformation/index.do?envType=undefined

Thanks
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mvkrajuAuthor Commented:
here is my code
<a href="#" onclick="this.href='/iaInformation/index.do?envType='+document.index.envType.value;" ><bean:message key="mwr.link.msg.whows.rpt" /></a>

am i doing anything wrong.
my form name is index
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rrzCommented:
>var envType = "T";
maybe I should have used  
var envType = document.index.envType[0].value;  
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mvkrajuAuthor Commented:
rrz.. it seams javascript is working fine. It's picking up right envType value.
But some how when i click on the link, it's not calling /iaInformation/index.do link.
I guess there is some thing wrong in the following statement

document.links[0].href
 
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mvkrajuAuthor Commented:
sorry rrz...
It's working fine. Actually i have links in my page, so when i changed

document.links[0].href  to document.links[1].href
it's working fine.

Thanks

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