javascript - <button> not working in IE -

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i have multiple buttons different functionality, each button behaves submit button. want give different behavior each of button created.

<form action="/createupdate"> <!--here have form elements textbox , checkboxes etc --!>        <button name="buttonname" id="submitbutton1" value="create">create</button>         <button name="buttonname" id="submitbutton2" value="update">update</button>   </form>

if change buttons input type=submit, pressed button sent.

for example:

<form action="/createupdate"> <!--here have form elements textbox , checkboxes etc -->        <input type="submit" name="buttonname" id="submitbutton1" value="create" />        <input type="submit" name="buttonname" id="submitbutton2" value="update" /> </form>

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