jQuery Show and Hide Checkboxes

I want to show and hide these checkboxes. I have Six Topics and each of those has checkboxes underneath:

So:

Patent Attorney
Venture Capital
Product Designer
Manufacturer
General Questions
Other

Each of these topics has checkboxes underneath. What I want to do is when I click patent attorney, the check boxes show up, when I click say, Product Designer, the Patent Attorney boxes dissapear and the checkboxes for the Product Designer Appear.

Here is the code that I have so far:

<?php

# This block must be placed at the very top of page.
# --------------------------------------------------
require_once( dirname(__FILE__).'/form.lib.php' );
phpfmg_display_form();
# --------------------------------------------------

function phpfmg_form( $sErr = false ){
        $style=" class='form_text' ";

?>

<form name="frmFormMail" action='' method='post' enctype='multipart/form-data' onsubmit='return fmgHandler.onsubmit();'>
<input type='hidden' name='formmail_submit' value='Y'>
<div id='err_required' class="form_error" style='display:none;'>
    <label class='form_error_title'>Please check the required fields</label>
</div>


<ol class='phpfmg_form' >

<li class='field_block' id='field_0_div'><div class='col_label'>
    <label class='form_field'>Name</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_0" id="field_0" value="<?php phpfmg_hsc("field_0"); ?>" class='text_box'>
    <div id='field_0_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_1_div'><div class='col_label'>
    <label class='form_field'>Street Address</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_1" id="field_1" value="<?php phpfmg_hsc("field_1"); ?>" class='text_box'>
    <div id='field_1_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_2_div'><div class='col_label'>
    <label class='form_field'>City</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_2" id="field_2" value="<?php phpfmg_hsc("field_2"); ?>" class='text_box'>
    <div id='field_2_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_3_div'><div class='col_label'>
    <label class='form_field'>State</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <?php phpfmg_dropdown( 'field_3', "Alabama|Alaska|Arizona|Arkansas|California|Colorado|Connecticut|Delaware|Florida|Georgia|Hawaii|Idaho|Illinois|Indiana|Iowa|Kansas|Kentucky|Louisiana|Maine|Maryland|Massachusetts|Michigan|Minnesota|Mississippi|Missouri|Montana|Nebraska|Nevada|New Hampshire|New Jersey|New Mexico|New York|North Carolina|North Dakota|Ohio|Oklahoma|Oregon|Pennsylvania|Rhode Island|South Carolina|South Dakota|Tennessee|Texas|Utah|Vermont|Virginia|Washington|West Virginia|Wisconsin|Wyoming", '' );?>
    <div id='field_3_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_4_div'><div class='col_label'>
    <label class='form_field'>Zip Code</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_4" id="field_4" value="<?php phpfmg_hsc("field_4"); ?>" class='text_box'>
    <div id='field_4_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_5_div'><div class='col_label'>
    <label class='form_field'>Phone Number</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_5" id="field_5" value="<?php phpfmg_hsc("field_5"); ?>" class='text_box'>
    <div id='field_5_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_6_div'><div class='col_label'>
    <label class='form_field'>Company</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_6" id="field_6" value="<?php phpfmg_hsc("field_6"); ?>" class='text_box'>
    <div id='field_6_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_7_div'><div class='col_label'>
    <label class='form_field'>Email Address</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_7" id="field_7" value="<?php phpfmg_hsc("field_7"); ?>" class='text_box'>
    <div id='field_7_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_8_div'><div class='col_label'>
    <label class='form_field'>Country</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <?php phpfmg_dropdown( 'field_8', "Afghanistan|Aland Islands|Albania|Algeria|American Samoa|Andorra|Angola|Anguilla|Antarctica|Antigua and Barbuda|Argentina|Armenia|Aruba|Australia|Austria|Azerbaijan|Bahamas|Bahrain|Bangladesh|Barbados|Belarus|Belgium|Belize|Benin|Bermuda|Bhutan|Bolivia|Bosnia and Herzegovina|Botswana|Bouvet Island|Brazil|British Indian Ocean Territory|British Virgin Islands|Brunei|Bulgaria|Burkina Faso|Burundi|Cambodia|Cameroon|Canada|Cape Verde|Cayman Islands|Central African Republic|Chad|Chile|China|Christmas Island|Cocos (Keeling) Islands|Colombia|Comoros|Congo|Cook Islands|Costa Rica|Croatia|Cuba|Cyprus|Czech Republic|Democratic Republic of Congo|Denmark|Disputed Territory|Djibouti|Dominica|Dominican Republic|East Timor|Ecuador|Egypt|El Salvador|Equatorial Guinea|Eritrea|Estonia|Ethiopia|Falkland Islands|Faroe Islands|Federated States of Micronesia|Fiji|Finland|France|French Guyana|French Polynesia|French Southern Territories|Gabon|Gambia|Georgia|Germany|Ghana|Gibraltar|Greece|Greenland|Grenada|Guadeloupe|Guam|Guatemala|Guinea|Guinea-Bissau|Guyana|Haiti|Heard Island and Mcdonald Islands|Honduras|Hong Kong|Hungary|Iceland|India|Indonesia|Iran|Iraq|Iraq-Saudi Arabia Neutral Zone|Ireland|Israel|Italy|Ivory Coast|Jamaica|Japan|Jordan|Kazakhstan|Kenya|Kiribati|Kuwait|Kyrgyzstan|Laos|Latvia|Lebanon|Lesotho|Liberia|Libya|Liechtenstein|Lithuania|Luxembourg|Macau|Macedonia|Madagascar|Malawi|Malaysia|Maldives|Mali|Malta|Marshall Islands|Martinique|Mauritania|Mauritius|Mayotte|Mexico|Moldova|Monaco|Mongolia|Montenegro|Montserrat|Morocco|Mozambique|Myanmar|Namibia|Nauru|Nepal|Netherlands Antilles|Netherlands|New Caledonia|New Zealand|Nicaragua|Niger|Nigeria|Niue|Norfolk Island|North Korea|Northern Mariana Islands|Norway|Oman|Pakistan|Palau|Palestinian Occupied Territories|Panama|Papua New Guinea|Paraguay|Peru|Philippines|Pitcairn Islands|Poland|Portugal|Puerto Rico|Qatar|Reunion|Romania|Russia|Rwanda|Saint Helena and Dependencies|Saint Kitts and Nevis|Saint Lucia|Saint Pierre and Miquelon|Saint Vincent and the Grenadines|Samoa|San Marino|Sao Tome and Principe|Saudi Arabia|Select One|Senegal|Serbia|Seychelles|Sierra Leone|Singapore|Slovakia|Slovenia|Solomon Islands|Somalia|South Africa|South Georgia and South Sandwich Islands|South Korea|Spain|Spratly Islands|Sri Lanka|Sudan|Suriname|Svalbard and Jan Mayen|Swaziland|Sweden|Switzerland|Syria|Taiwan|Tajikistan|Tanzania|Thailand|Togo|Tokelau|Tonga|Trinidad and Tobago|Tunisia|Turkey|Turkmenistan|Turks And Caicos Islands|Tuvalu|US Virgin Islands|Uganda|Ukraine|United Arab Emirates|United Kingdom|United Nations Neutral Zone|United States Minor Outlying Islands|United States|Uruguay|Uzbekistan|Vanuatu|Vatican City|Venezuela|Vietnam|Wallis and Futuna|Western Sahara|Yemen|Zambia|Zimbabwe", '' );?>
    <div id='field_8_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_9_div'><div class='col_label'>
    <label class='form_field'>Web Address</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <input type="text" name="field_9" id="field_9" value="<?php phpfmg_hsc("field_9"); ?>" class='text_box'>
    <div id='field_9_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_10_div'><div class='col_label'>
    <label class='form_field'>Description Of Needs</label> <label class='form_required' >*</label> </div>
    <div class='col_field'>
    <textarea name="field_10" id="field_10" rows=4 cols=25 class='text_area'><?php phpfmg_hsc("field_10"); ?></textarea>

    <div id='field_10_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_11_div'><div class='col_label'>
    <label class='form_field'>Patent Attorney</label> <label class='form_required' > </label> </div>
    <div class='col_field'>
    <?php phpfmg_checkboxes( 'field_11', "General Inquiry|Client Needs Regulatory Information/Advice" );?>
    <div id='field_11_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_12_div'><div class='col_label'>
    <label class='form_field'>Venture Capital Manager or Advisor</label> <label class='form_required' > </label> </div>
    <div class='col_field'>
    <?php phpfmg_checkboxes( 'field_12', "General Inquiry|Client Needs Regulatory Information/Advice" );?>
    <div id='field_12_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_13_div'><div class='col_label'>
    <label class='form_field'>Product Designer</label> <label class='form_required' > </label> </div>
    <div class='col_field'>
    <?php phpfmg_checkboxes( 'field_13', "Conceptual Stage?|Have Drawings?|Have Product Standard(s)?|Prototype Stage?|Designed To Comply With Product Standard(s)?|Have Drawings/Photos?|Prototype Available For Physical Review?|Currently Being Manufactured?|End User/Country Requiring Certification?|Designed To Correct Product Standard(s)?" );?>
    <div id='field_13_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_14_div'><div class='col_label'>
    <label class='form_field'>Manufacturer</label> <label class='form_required' > </label> </div>
    <div class='col_field'>
    <?php phpfmg_checkboxes( 'field_14', "Currently Being Manufactured?|End User/Country Requiring Certification?" );?>
    <div id='field_14_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_15_div'><div class='col_label'>
    <label class='form_field'>I Have A General Question</label> <label class='form_required' > </label> </div>
    <div class='col_field'>
    <?php phpfmg_checkboxes( 'field_15', "General Question/Information" );?>
    <div id='field_15_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_16_div'><div class='col_label'>
    <label class='form_field'>Other</label> <label class='form_required' > </label> </div>
    <div class='col_field'>
    <?php phpfmg_checkboxes( 'field_16', "Other" );?>
    <div id='field_16_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='field_17_div'><div class='col_label'>
    <label class='form_field'>PDF or JPG Attachment Only</label> <label class='form_required' > </label> </div>
    <div class='col_field'>
    <input type="file" name="field_17" id="field_17" value="" class='text_box' onchange="fmgHandler.check_upload(this);">
    <div id='field_17_tip' class='instruction'></div>
    </div>
</li>

<li class='field_block' id='phpfmg_captcha_div'>
    <div class='col_label'><label class='form_field'>Security Code:</label> <label class='form_required' >*</label> </div><div class='col_field'>
    <?php phpfmg_show_captcha(); ?>
    </div>
</li>

            <li>
            <div class='col_label'> </div>
            <div class='form_submit_block col_field'>

                <input type='submit' value='Submit' class='form_button'>
                <span id='phpfmg_processing' style='display:none;'>
                    <img id='phpfmg_processing_gif' src='<?php echo PHPFMG_ADMIN_URL . 'file:///C|/DOCUME~1/nikkih/LOCALS~1/Temp/Temporary Directory 41 for myform[1].zip/20100621-f7c0/?mod=image&func=processing' ;?>' border=0 alt='Processing...'> <label id='phpfmg_processing_dots'></label>
                </span>
            </div>
            </li>

</ol>



</form>

<?php

    phpfmg_javascript($sErr);

}
# end of form

function phpfmg_form_css(){
?>
<style type='text/css'>

body{
    margin-left: 18px;
    margin-top: 18px;
}

body{
    font-family : Verdana, Arial, Helvetica, sans-serif;
    font-size : 13px;
    color : #474747;
    background-color: transparent;
}

select, option{
    font-size:13px;
}

ol.phpfmg_form{
    list-style-type:none;
    padding:0px;
    margin:0px;
}

ol.phpfmg_form li{
    margin-bottom:5px;
    clear:both;
    display:block;
    overflow:hidden;
    width: 100%
}

.form_field, .form_required{
    font-weight : bold;
}

.form_required{
    color:red;
    margin-right:8px;
}

.field_block_over{
}

.form_submit_block{
    padding-top: 3px;
}

.text_box, .text_area, .text_select {
    width:300px;
}

.text_area{
    height:80px;
}

.form_error_title{
    font-weight: bold;
    color: red;
}

.form_error{
    background-color: #F4F6E5;
    border: 1px dashed #ff0000;
    padding: 10px;
    margin-bottom: 10px;
}

.form_error_highlight{
    background-color: #F4F6E5;
    border-bottom: 1px dashed #ff0000;
}

div.instruction_error{
    color: red;
    font-weight:bold;
}

hr.sectionbreak{
    height:1px;
    color: #ccc;
}

<?php

    phpfmg_text_align();
    echo "</style>\n";

}
# end of css

# By: formmail-maker.com
?>

I have been spinning my wheels for a couple weeks on this and researching countless hours. Any help is greatly appreciated.

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