How to Generate Random Number of Barcode in Jquery

I need a code generator in jQuery that when clicking on the button it appears in the input text a number of 13 digits, start in number 7.

This is the code in my view:

<div class="form-group <?php echo !empty(form_error('barcode')) ? 'has-error':'';?>">
    <label for="barcode">Barcode:</label>
    <div class="input-group barcode">
        <div class="input-group-addon">
            <button class="fa fa-barcode" title="Generate Random Barcode"></button>
        </div>
        <input type="text" class="form-control" id="barcode" name="barcode" required value="<?php echo set_value('barcode');?>">
    </div>
    <?php echo form_error("barcode","<span class='help-block'>","</span>");?>
 </div>

This is the input text + button:

The generated number like this: