Pre checked check box [closed] - php

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I have a site that has multiple ways to access our "email me for more information" form.
On the form, it has a list of checkboxes that they can check that they want to be emailed about more information for. Is it possible to have the check box prechecked depending on what page they come from?
For example, they visit our "Product 12" page and follow the link to the form and there is a checkbox to receive more information on Product 12 that is pre-checked because they came to the form from the Product 12 page.
Here is my form code:
<form id="formElem" name="formElem" action="" method="post">
<fieldset class="step">
<legend>Personal Details</legend>
<p>
<label for="fullname">Full Name</label>
<input id="fullname" name="username" />
</p>
<p>
<label for="company">Company Name</label>
<input id="company" name="company" />
</p>
<p>
<label for="title">Title</label>
<input id="title" name="title" />
</p>
<p>
<label for="phone">Phone Number</label>
<input id="phone" name="phone" />
</p>
<p>
<label for="email">Email</label>
<input id="email" name="email" placeholder="info#.com" type="email" AUTOCOMPLETE=OFF />
</p>
</fieldset>
<fieldset class="step">
<legend>Products I'm interested in...</legend>
<p>
<input type="checkbox" name="telematics" value="telematics">Telematics<br>
</p>
<p>
<input type="checkbox" name="controllers" value="controllers">Controllers<br>
</p>
<p>
<input type="checkbox" name="cots" value="cots">Custom-off-the-Shelf<br>
</p>
<p>
<input type="checkbox" name="displays" value="displays">Displays\Operator Interfaces<br>
</p>
<p>
<input type="checkbox" name="cordReels" value="cordreels">Cord Reels<br>
</p>
<p>
<input type="checkbox" name="pdm" value="pdm">Power Distribution Modules<br>
</p>
<p>
<input type="checkbox" name="rtc" value="rtc">Real Time Clock<br>
</p>
</fieldset>
<fieldset class="step">
<legend>Services I'm interested in...</legend>
<p>
<input type="checkbox" name="productDev" value="productdev">Product Development<br>
</p>
<p>
<input type="checkbox" name="desEng" value="deseng">Design Engineering<br>
</p>
<p>
<input type="checkbox" name="dfx" value="dfx">DFX<br>
</p>
<p>
<input type="checkbox" name="transServices" value="transServices">Transition Services<br>
</p>
<p>
<input type="checkbox" name="stratSourcing" value="stratSourcing">Strategic Sourcing<br>
</p>
<p>
<input type="checkbox" name="planning" value="planning">Planning<br>
</p>
<p>
<input type="checkbox" name="manufacturing" value="manufacturing">Manufacturing<br>
</p>
<p>
<input type="checkbox" name="fullfillment" value="fullfillment">Fullfillment<br>
</p>
<p>
<input type="checkbox" name="prodLifecycle" value="prodLifecycle">Product Life-Cycle Management<br>
</p>
</fieldset>
<fieldset class="step">
<legend>Confirm</legend>
<p>Everything in the form was correctly filled
if all the steps have a green checkmark icon.
A red checkmark icon indicates that some field
is missing or filled out with invalid data.
</p>
<p class="submit">
<button id="registerButton" type="submit">Register</button>
</p>
</fieldset>
</form>
The serverside code will be PHP.
Plz respond.

Answer 1

If I was in your shoes, I would use a query string variable to pass the ID of your page (or product ID would be ideal) on the link linking your product page to the form.
ie.) /formPage.html?id=12
On the form page, give each input element a unique ID. Then using either server side code or javascript, check if the id is present in the querystring, if so, check what it is and programatically check your checkbox.
It's easy with jquery:
$("#product12ID").prop("checked", true); <---- This will check the checkbox that has an id=product12ID
It would be helpful to know what language you're using (ASP.NET, PHP, etc). It would help fine tune what direction to go in.