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Passing variable value from javascript to jsp page at run time

How can we pass the variable value from javascript to jsp page at runtime? I am getting this problem when i want to display the second drop down box according to the selected item in the first drop down.
For ex: Lets consider we have a drop down field named Gender(Male,Female).
If we select Male then the next Drop Down has to be shown as (Kumar, Mr,...)

vijaysdon

Newbie Poster

4 posts since Sep 2006

Reputation Points: 10

Solved Threads: 0

5 Years Ago

0

You can't. JSP runs on the server, Javascript (which is NOT Java) runs on the client. You might want to look into something like AJAX which will allow your javascript to make a complete connection to the server, receive data, and then update your page, which will make it look like you are doing what you are asking, but it takes longer than a true programmatic connection.

P.S. Don't come back and ask for more info concerning AJAX. That is another thing does not belong on this forum.

masijade

Industrious Poster

Moderator

4,253 posts since Feb 2006

Reputation Points: 1,471

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3 Years Ago

0

Request all developer to send codes....

Thanks in advance

ukbasak

Newbie Poster

8 posts since Nov 2008

Reputation Points: 10

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3 Years Ago

0

Request all developer to send codes....

Thanks in advance

What a maroon.

masijade

Industrious Poster

Moderator

4,253 posts since Feb 2006

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3 Years Ago

0

Yes u can do it

but u hv to speicify from where do u want
to display the list of all the the male members

if u want that value to be get from the database
then u can use ajax from ur current jsp page

This is the Demo for ur help

<html>
<head>






</head>



<body>
<script type="text/javascript">function ajaxFunction()
{var xmlHttp;
try
  {  // Firefox, Opera 8.0+, Safari 
   xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {  // Internet Explorer 
   try
    {    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");    }
  catch (e)
    {    try
      {      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");      }
    catch (e)
      {      alert("Your browser does not support AJAX!");      return false;      }    }  }
  xmlHttp.onreadystatechange=function()
    {
	   //alert("i m  not  in ready state");
	   
	    if(xmlHttp.readyState==0)
      {
      //document.myForm.time.value=xmlHttp.responseText;
	    alert("The request is not initialized");
	  
	   

	   
	  
      }
	      if(xmlHttp.readyState==1)
      {
      //document.myForm.time.value=xmlHttp.responseText;
	    alert("The request has been set up");
	  
	   

	   
	  
      }
	  
	  
	  
	        if(xmlHttp.readyState==2)
      {
      //document.myForm.time.value=xmlHttp.responseText;
	    alert("The request has been sent");
	  
	   

	   
	  
      }
	  
	  	        if(xmlHttp.readyState==3)
      {
      //document.myForm.time.value=xmlHttp.responseText;
	    alert("The request is in process");
	  
	   

	   
	  
      }
	   
	  
	   
	  
	  
	   
	   
	  
    if(xmlHttp.readyState==4)
      {
      //document.myForm.time.value=xmlHttp.responseText;
	    //alert("i m in ready state");
	  
	   document.getElementById("theResponse").innerHTML = xmlHttp.responseText;

	   
	  
      }
    }
	      var gender=document.myForm.gender.value;
	      var url="getAllGender.jsp";
          url=url+"?gender="+gender+"&sid="+Math.random();
          //url=url+"&sid="+Math.random();

	
	  
         xmlHttp.open("GET",url,true);
         xmlHttp.send(null); 
   }
  
  </script>

  <form name="myForm">
 <select   name="gender"  onChange="ajaxFunction(); ">
<option  >Select gender</option>
<option>Male</option>


<option>Female</option>

</select>



<div id="theResponse">

</div>
</form></body>
</html>

but in getAllGender.jsp
u hv to get the data from the datebase
now it is up to u
i gave u the hint
no much time for me dear
i hope this is very benicifial for u

amarjeetsingh

Newbie Poster

21 posts since Feb 2009

Reputation Points: 2

Solved Threads: 1

3 Years Ago

Show Comments

1

Is there any problem between you and use of code tags that are required by this forum?
If you took time to read previous replies you found find that
- Post is old and revoked by somebody who just seek quick solution to his school assignment or plunge the hole in what ever he told his employer about his experiences and knowledge
- Use of Ajax was mentioned, but considered as of topic or different point of implementation in this scenario, therefore not discussed

peter_budo

Code tags enforcer

Moderator

15,436 posts since Dec 2004

Reputation Points: 2,806

Solved Threads: 902

2 Years Ago

0

How can we pass the variable value from javascript to jsp page at runtime? I am getting this problem when i want to display the second drop down box according to the selected item in the first drop down.
For ex: Lets consider we have a drop down field named Gender(Male,Female).
If we select Male then the next Drop Down has to be shown as (Kumar, Mr,...)

chethandas

Newbie Poster

2 posts since May 2010

Reputation Points: 10

Solved Threads: 0

2 Years Ago

Show Comments

1

If you took your time to read answer by masijade you wouldn't have to post this question.

Thread closed.

peter_budo

Code tags enforcer