Remove text in Logon page in portal 7.3

Hi Experts,

We are using portal 7.3 version,we would like to remove Get Support text in logon page as Forget Password as shown below and when user click on

Get support link it will ask user details.if user will enter his details  then he will get new password to his mail id.the new password having dot(.) symbol.we want to remove that dot(.)symbol.how can i implement these changes in portal 7.3.

Please help me.

Thank you in advance.

Regards,

Vanitha