Get the Querystring variables using javascript

This JS block helps you to get the query string values of a url at the client side.

function getUrlVars() {

            var vars = [], hash;

            var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');

            for (var i = 0; i < hashes.length; i++) {

                hash = hashes[i].split('=');

                vars.push(hash[0]);

                vars[hash[0]] = hash[1];

            }

            return vars;

        }

If you want to get the query string value of “RecordId” simply you can say

var recordIdValue = getUrlVars()["RecordId"];

The record id will contain the RecordId value