Login Cancel OK function checkUname(uname) { var returnValue = false; var valid_name = /^[A-Z a-z 0-9]{8,12}$/; if (!valid_name.test(uname.value)) { alert (username must ... ); }

Login

1.The username should have between 3 and 20 characters and contain only letters and numbers [a-Z, 0-9]

Re-write the regular expression below.

2.The password should have a minimum of six characters and must contain at least one upper-case letter and one number.

Re-write the regular expression below.