I have a URL like http://localhost/dms/mduserSecurity/UIL/index.php?menu=true&submenu=true&pcode=1235.
I want to get the URL without the query s
To get every part of the URL except for the query:
var url = (location.origin).concat(location.pathname).concat(location.hash);
Note that this includes the hash as well, if there is one (I'm aware there's no hash in your example URL, but I included that aspect for completeness). To eliminate the hash, simply exclude .concat(location.hash).
It's better practice to use concat to join Javascript strings together (rather than +): in some situations it avoids problems such as type confusion.