javascript - Empty the contents of a textarea after submit -

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i have comment box (textarea) inside dialog. if comment saved want clear contents of textarea , close dialog box. atm dialog box close need wipe contents.

<textarea id="commentbox" type="text" runat="server" rows="7"  maxlength="2000" />   if (commentsuccessfullyupdated == "true")  { //empty comment box?? //something $("#commentbox").empty();  //closes dialog box $("#dialog").dialog('close'); 

thanks replies

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edit: guys. running through code not working. think has in order pick correct vales , resolve biding issue had use:

 function submitbutton() {             var commentboxdata = $('#<%=commentbox.clientid%>').val();            } 

when run through breakpoint returns:

function submitbutton() {             var commentboxdata = $('#ctl00_contentplaceholder1_commentbox').val(); } 

and:

<textarea name="ctl00$contentplaceholder1$commentbox" id="ctl00_contentplaceholder1_commentbox" type="text" rows="7" maxlength="2000"> </textarea>  

so im guessing im not referencing same textarea when try empty it. tried

$("#commentbox.clientid").val(''); 

but no joy....ay ideas?

$('#commentbox').val(''); 

use val() method, passing in empty string.

documentation: http://api.jquery.com/val

also, mark wrong. textarea isn't self-closing element. need </textarea> tag. , type="text" isn't necessary (probably not valid either)

as per edit, can either set ids static @ top of .aspx file (i think it's clientid="static")

or can use different selector:

$('textarea').filter('[id*=commentbox]').val('');