javascript - ASP.NET - onkeydown event not working in Firefox -


so having issue in firefox onkeydown event image button. don't want button action fire until let off button. works great in both ie , chrome. cannot figure out why doesn't work in firefox(20.0.1). here image button code:

<asp:imagebutton id="btnbutton1" imageurl="/images/target.png" runat="server"  height="75" width="75" onkeydown="return false;" onkeyup="buttonclick()" />

so onkeyup seems work perfect in browsers, onkeydown not want work in firefox , cannot figure out. appreciated.

i don't know if help, post javascript function onkeyup well:

 function buttonclick() {     document.getelementbyid('<%=btnbutton1.clientid %>').click();     return true; }

hmmm, can try?

$(document).on("keypress", ".chat-input ", function (val) {     cleartimeout(timer);     timer = settimeout(function () {       //codes     }, 1); }).on('keydown', function (e) {     if (e.keycode == 8 || e.keycode == 13) {         $('.chat-input').trigger('keypress');     } });

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