I have drop-down list, where user can select any options when they register on my site. I like to make it more easier for example if user vist specific url. They will automatically selected on Publishers opinion when they visit on domain.com/register#publishers
here is my code:
<div class="select_box">
<select name="registared_as" id="registared_as">
<option value="0">Students / Experts</option>
<option value="1">University Academics</option>
<option value="2">Publishers</option>
</select>
</div>
If the trigger is an url anchor, like your example with domain.com/register#publishers you can get the url anchor using javascript vanilla like this:
var anchor = window.location.hash.substr(1);
Then, you must select the option, also with javascript:
if (anchor == "publishers") {
document.getElementById("registared_as").selectedIndex = 2;
}
And so on for each option..