Help with UI Page - get parameter from URL

[kchorny]

I have built the below UI page (probably not very elegantly) called sd_authorization.  I am getting to this page via a redirect from another ui page, and I am passing the email address through the URL (sd_authorization.do?sysparm_email=anaddress@domain.com).  However, I'm flying by the seat of my pants and need help getting the email address from the URL into the email field on this form, and then setting the field read-only if there is a value in it.

<g:ui_form>
<!-- used in exactly one place -->
<style>
div.sd_auth {
width: 20em;
margin: 1em;
padding: 1em;
padding-top: 0;
border: 1px solid lightgrey;
border-radius: 4px;
}

div.sd_auth div {
margin-top: 1em;
}

div.sd_auth input {
width: 100%;
}

div.sd_auth label {
font-weight: bold;
}

.welcome_content {
margin-left: 1em;
margin-right: 1em;
}

/* make breadcrumbs happy */
.welcome_content A.breadcrumb {
padding: 0 .5em;
margin-bottom: 0;
background-color: transparent;
border-radius: 0;
}
</style>

<div class="sd_auth">
<h5>${gs.getMessage('You have successfully verified your email address. You have been sent an email with the Authorization Code. Once received, complete the below fields and click Submit Authorization Request.','info')}</h5>
<h3>${gs.getMessage('Authorize Service Desk Account')}</h3>
<h5>${gs.getMessage('Starred (*) fields are required')}</h5>
<div>
<label class="control-label" for="email">${gs.getMessage('*Authorization Code')}</label>
<input id="auth_code" type="text" name="auth_code" value="" class="form-control" size="40" autocomplete="off" />
</div>
<div>
<label class="control-label" for="email">${gs.getMessage('*Email address')}</label>
<input id="email" type="text" name="email" value="" class="form-control" size="40" autocomplete="off" />
</div>
<div>
<label class="control-label" for="email">${gs.getMessage('*First Name')}</label>
<input id="first_name" type="text" name="first_name" value="" class="form-control" size="40" autocomplete="off" />
</div>
<div>
<label class="control-label" for="email">${gs.getMessage('*Last Name')}</label>
<input id="last_name" type="text" name="last_name" value="" class="form-control" size="40" autocomplete="off" />
</div>
<div>
<label class="control-label" for="bPhone">${gs.getMessage('*Business Phone')}</label>
<input id="bPhone" type="text" name="bPhone" value="" class="form-control" size="14" autocomplete="off" />
</div>
<div>
<label class="control-label" for="mPhone">${gs.getMessage('Mobile Phone')}</label>
<input id="mPhone" type="text" name="mPhone" value="" class="form-control" size="14" autocomplete="off" />
</div>
<div>
<label class="control-label" for="email">${gs.getMessage('*Personal 4-digit PIN')}</label>
<input id="pin" type="text" name="pin" value="" class="form-control" size="40" autocomplete="off" />
<h5>${gs.getMessage('Please choose your PIN carefully and write it down.')}</h5>
</div>
<div class="text-center">
<button id="reset" class="btn btn-primary" type="button" onclick="checkAuth();return false;">Submit Authorization Request</button>
</div>
<div class="text-center">
<button id="cancel" class="btn btn-default" type="button" style="margin-right:5px" onclick="window.history.back()">Cancel</button>
</div>
</div>
</g:ui_form>

[nayanawadhiya1]

Hello,

Below link will help you to parse parameter from URL in UI page - 

How To Get Parameters/Values From a URL in ServiceNow

[kchorny]

Okay so I should just be able to put this:

<g:evaluate>
var emailAddress = '$[sysparm_email]';
</g:evaluate>

Somewhere in my UI Page... but where? At the top of the HTML section? 

And then once I'm able to extract it, how do I insert it into the email field that is on the form?

[nayanawadhiya1]

Using Jelly Script you can achieve it.

<g:evaluate var = "jvar_email">
var emailAddress = '$[sysparm_email]';

emailAddress;

</g:evaluate>

Then use ${jvar_email} in your HTML part.

[nayanawadhiya1]

Any update on this?
Can you mark my answer as correct, helpful and hit like if you were able to achieve the requirement. This helps in removing this question from unanswered list and helps users to learn from your thread. Thanks in advance.