jquery get all form elements: input, textarea & select

Edit: As pointed out in comments (Mario Awad & Brock Hensley), use .find to get the children

$("form").each(function(){
    $(this).find(':input') //<-- Should return all input elements in that specific form.
});

forms also have an elements collection, sometimes this differs from children such as when the form tag is in a table and is not closed.

var summary = [];
$('form').each(function () {
    summary.push('Form ' + this.id + ' has ' + $(this).find(':input').length + ' child(ren).');
    summary.push('Form ' + this.id + ' has ' + this.elements.length + ' form element(s).');
});

$('#results').html(summary.join('<br />'));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<form id="A" style="display: none;">
    <input type="text" />
    <button>Submit</button>
</form>
<form id="B" style="display: none;">
    <select><option>A</option></select>
    <button>Submit</button>
</form>

<table bgcolor="white" cellpadding="12" border="1" style="display: none;">
<tr><td colspan="2"><center><h1><i><b>Login
Area</b></i></h1></center></td></tr>
<tr><td><h1><i><b>UserID:</b></i></h1></td><td><form id="login" name="login" method="post"><input
name="id" type="text"></td></tr>
<tr><td><h1><i><b>Password:</b></i></h1></td><td><input name="pass"
type="password"></td></tr>
<tr><td><center><input type="button" value="Login"
onClick="pasuser(this.form)"></center></td><td><center><br /><input
type="Reset"></form></td></tr></table></center>
<div id="results"></div>

May be :input selector is what you want

$("form").each(function(){ $(':input', this)//<-- Should return all input elements in that specific form. });

$("form").each(function(){
    $(this).filter(':input') //<-- Should return all input elements in that specific form.
});

The below code helps to get the details of elements from the specific form with the form id,

$('#formId input, #formId select').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

The below code helps to get the details of elements from all the forms which are place in the loading page,

$('form input, form select').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

The below code helps to get the details of elements which are place in the loading page even when the element is not place inside the tag,

$('input, select').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

NOTE: We add the more element tag name what we need in the object list like as below,

Example: to get name of attribute "textarea",

$('input, select, textarea').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

If you have additional types, edit the selector:

var formElements = new Array();
$("form :input").each(function(){
    formElements.push($(this));
});

All form elements are now in the array formElements.