Question

I am trying to parse through a typical form using jquery. I want to obtain all details about the various fields in the form- viz field name, field type (eg radio/checkbox/list)…

How do I determine if a field allows multiple values to be selected? (eg in check box or list box)?

If this cannot be done using jquery, then can it be done using pure javascript? I already have with me a ref to the element for which this (whether multiple values are allowed or not) has to be determined…

Answer 1

Surround your control with some <div> as:

<div id="testCheck">
                <input type="checkbox" checked="checked" value="1" />
                <input type="checkbox" checked="checked" value="2" />
                <input type="checkbox" checked="checked" value="3" />
                <input type="checkbox" checked="checked" value="4" />
                <input type="checkbox" checked="checked" value="5" />
                <input type="checkbox" checked="checked" value="6" />
                <input type="checkbox" checked="checked" value="7" />
                <input type="checkbox" checked="checked" value="8" />
    </div>

and check the selected or unselected elements using follwwing jquery code snippet. .size() will return the no of checked item and you can get the value of selected items by .val().

//Write your code when Document is loaded or some element click

 $(document).ready(function() {
                $("#testChk").click(function() {
                    alert($("#testCheck :checked").size());
                    //function to print the value of each checked checkboxes
                    $("#testCheck :checked").each(function() {
                        alert("value = " + $(this).val());   
                });

for more help follow these links:

How can I know which radio button is selected via jQuery?

have a look on jquery selector. you should watch bottom itms :password, :reset etc that you need to use.
http://api.jquery.com/category/selectors/

http://jquery-howto.blogspot.com/2008/12/how-to-check-if-checkbox-is-checked.html

Handling Checkboxes, Radio Buttons and Select Options in jQuery

Hope this help you little bit…