警报消息后的Javascript重定向

I have one asp.net page , it consists of some controls along with a close button. If the user clicks on the close button, it will open ModaldialogBox with one text box for entering closing reason. Once the user enters the reason and clicking on the save button, the modal popup shows the alert message and close the modal popup. The existing code for this is shown below.I have one asp.net page , it consists of some c