Is there an inverse function to jQuery serialize?

Short Answer: No, there isn't something built into jQuery to do this. Not sure why not...

But here is a jQuery plugin that should do the trick if you are using .serialize() to get a serialized string:

$.fn.deserialize = function (serializedString) 
{
    var $form = $(this);
    $form[0].reset();    // (A) optional
    serializedString = serializedString.replace(/\+/g, '%20'); // (B)
    var formFieldArray = serializedString.split("&");

    // Loop over all name-value pairs
    $.each(formFieldArray, function(i, pair){
        var nameValue = pair.split("=");
        var name = decodeURIComponent(nameValue[0]); // (C)
        var value = decodeURIComponent(nameValue[1]);
        // Find one or more fields
        var $field = $form.find('[name=' + name + ']');

        // Checkboxes and Radio types need to be handled differently
        if ($field[0].type == "radio" || $field[0].type == "checkbox") 
        {
            var $fieldWithValue = $field.filter('[value="' + value + '"]');
            var isFound = ($fieldWithValue.length > 0);
            // Special case if the value is not defined; value will be "on"
            if (!isFound && value == "on") {
                $field.first().prop("checked", true);
            } else {
                $fieldWithValue.prop("checked", isFound);
            } 
        } else { // input, textarea
            $field.val(value);
        }
    });
    return this;
}

(A) The reset at the top is optional. You may want to reset the field values first, or may want to clear them using something like this: https://stackoverflow.com/a/6786237/1766230

(B) See https://stackoverflow.com/a/24417399/1766230 for why we need to replace +.

(C) See Mozilla Developer Javascript Reference for info on decodeURIComponent.

(Note: If you're using .serializeArray() or some other way to serialize your data, the above won't work; you may find some of these solutions useful: jQuery plugin to serialize a form and also restore/populate the form?)

Boring usage example:

var $form = $('form.myFormClass');
var s = $form.serialize();
$form.deserialize(s);

Here's a jsfiddle that let's you play around with setting values, clearing, resetting, and "deserializing": http://jsfiddle.net/luken/4VVs3/

Here is :

a=$('.price_analysis input').serializeArray();
aa={};
for (var i in a) {
    aa[a[i].name] = a[i].value;
}
alert( JSON.stringify(aa));