Hi,

Try below.

var myparm = getParmVal('sysparm_universal_request');
if (myparm) {
        g_form.setValue('ur', myparm);
    }

function getParmVal(name){
var url = document.URL.parseQuery();
if(url[name]){
return decodeURI(url[name]);
}
else{
return;
}
}