I have several forms synced to Salesforce currently running on a WordPress website using the Avada theme, but the client wants a new field added which will require adding an onload event in the body tag. I thought the easiest way to do this would be to go through the dashboard>Theme Options>Advanced>Code Fields but I don't see an option to add an event to the body tag. What's the best way to do this without editing the core template files (the forms are only on a few pages)?
Snippet of current code:
<form action="https://webto.salesforce.com/servlet/servlet.WebToLead?encoding=UTF-8" method="POST"><input type=hidden name="oid" value="00DU0000000H99p">
<input type=hidden name="retURL" value="https://www.sablesys.com/thank-you/">
<input type="hidden" name="member_status" value="Sent"/>
<!-- Campaign id for Quote Campaign -->
<input type="hidden" name="Campaign_ID" value="7010B000001Eiz3QAC" />
<input type="hidden" id="lead_source" name="lead_source" value="Website">
<label for="first_name">First Name</label><input id="first_name" maxlength="40" name="first_name" size="20" type="text" required/><br>
<label for="last_name">Last Name</label><input id="last_name" maxlength="80" name="last_name" size="20" type="text" required/><br>
<label for="company">Company</label><input id="company" maxlength="40" name="company" size="20" type="text" required/><br>
<label for="email">Email</label><input id="email" maxlength="80" name="email" size="20" type="text" required/><br>
<label for="city">City</label><input id="city" maxlength="40" name="city" size="20" type="text" required/><br>
Notes:<br><textarea id="00NU0000003mN8A" name="00NU0000003mN8A" rows="25" type="text" wrap="soft" style="width: 100%"></textarea><br>
<input type="submit" name="submit">
</form>
New code the client requested be added:
A new field for the form:
<input type="hidden" id="URL" name="URL" value="" >
A new onload event:
<body onload="document.getElementById('URL').value = document.location.href">
Is there a way to do a window.onload inside a script instead? I admit I don't know javascript well. Please be descriptive in your replies. Thanks.