Javascript help needed

[coolguyraj]

Hi...

I am stuck up with a problem..

I wanted some help on polling software in javascript.

I have a web page in HTML.

I want to incude a online poll for selecting 15 holidays out of the alloted 20.
I will have a list with the holiday names a user should be able to select the check box against it but it should be limited to 15.
Also a user should be able to vote only once.

I should be able to see the results in no of votes and the percentage against each holiday.preferably in a different page it should be password protected.

The main aim of the software is to help deciding the holiday based on user inputs.

Please help me...

Thanks in advance.

Coolguyraj.

[Garadon]

That is more server side(PHP,ASP,...) and not javascript. javascript can't save information on the server.

[Kor]

Only first of you goals is to be done with javascript, the limit of the checkboxes checked

<script type="text/javascript">
var maxA=15;//maximum allowed
var obj=[];
function checkT(){
var q=0;
for(var i=0;i<obj.length;i++){
disen(obj[i],false);
q=(obj[i].checked)?q+1:q;
}
if(q==maxA){
for(var i=0;i<obj.length;i++){
disen(obj[i],(!obj[i].checked))
}}}
function disen(o,b){
o.setAttribute('disabled',b);
return
}
onload = function(){
var inp = document.getElementById('container').getElementsByTagName('input');
for(var i=0;i<inp.length;i++){
if(inp[i].type=='checkbox'){
inp[i].onclick=checkT;
obj[obj.length]=inp[i];
}}}
</script>

...
<div id="container">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
... and so on till 20 checkboxes
</div>


The rest is to be done with a server-side application

[coolguyraj]

Thanks a lot for your help...

Still i am not able to understand it properly,it would be helpful if you could explain me in a broader sense.

I understood the code for limiting the check boxes to 15,But once i have the check boxes checked and the "vote" or "submit" button is pressed it should calculate the percentage of votes.

Can i do it without a database.

Hope you will help me.

Thanks.

Coolguyraj.

[Kor]

As we said, that is to be done only with a server-side application, not with a client-side one. Javascript alone can not read/write/store data.

[Pyth007]

The only way you would be able to do this in js is if everyone used the same page... and I don't mean the same html file, but rather the exact same page on the same computer at (or near) the same time. JS is client-side, which means that the only info stored or passed on has to come from the user's computer. If the user closes the browser window or even goes to a different site, all of that info would be lost (unless the client's computer stores that info in a cookie or temp. internet file). But then the info cannot be passed to some other user on a different computer.