/* Grabbing only digits in this example /i - ignore case */ var pattern1 = /.*EmployeeId=(\d+)/i; var url1 = 'http://www.test.com?Name=ABC&EmployeeId=123'; var url2 = 'http://www.test.com?Name=ABC&employeeid=123'; alert(url1.match(pattern1)[1]); alert(url2.match(pattern1)[1]);