Code that prevents repeated submission (Javascript) in JSP

DocumentStruts2 provides a repeat commit check mechanism, but what I want is not to bring up an error page, but to execute only one commit as nothing happens.

1. Set a variable and a variable, which can only be submitted once.

Reference content is as follows: <Script type = "text/javascript"> Function checkSubmit (){ If (checkSubmitFlg = true ){ Return false; } CheckSubmitFlg = true; Return true; } </Script> <Form onsubmit = "return checkSubmit ();" method = "post">

　　Method 1 is effective in both IE6 and FIREFOX experiments.

2. How to disable the button

　　Because our server is too slow, the buttons are grayed out to provide a better user experience.

Reference content is as follows: <Script type = "text/javascript"> Function disableSubmit (form ){ Var elements = form. elements; For (var I = 0; I <elements. length; I ++ ){ If (elements [I]. type = 'submit '){ Elements [I]. disabled = true; } } } </Script> <Form name = "form1" onsubmit = "setTimeout ('disablesubmit (form1) ', 100) return checkSubmit ();" method = "post">

　　If it is immediately disabled, the separate action settings of the button will become invalid. Therefore, a delay is required.

　　Method 2 is valid in IE6. The error message is invalid in FIREFOX because the cause is unknown. But it is the second insurance. It doesn't matter.