javascript - parent.alert event not getting fire on pressing enter key -

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i have main jsp page in alert functionality modified using

window.alert=function(txt)

in other jsp pages loaded in same document using iframe. parent.alert used in of these pages keep consistency.

this piece of code working with

<div onkeypress="handlekey()">     <button id='done' onclick="example()" >submit</button> </div>

script portion following

<script>     function handlekey(){         if ((window.event) && (window.event.keycode == 13))         {             // click search button             done.click();         }     }     function example(){         parent.alert('done');     } </script>

alert not fired if press enter key fired when click on button. alert gets fired when replace parent.alert alert.

this works fine me:

index.html

<html> <head>     <script>     window.alert = function(){         console.log('my alert');     }     </script> </head> <body>     <iframe src="iframe.html" id="myiframe"/> </body> </html>

iframe.html

<html> <head>     <script>     function handleevent() {         if ((window.event) && ((window.event.keycode == 13) || window.event.type == 'click')) {             example();         }     }      function example(){         parent.alert();     }     </script> </head> <body>     <div onkeypress="handleevent()">         <button id='done' onclick="handleevent()" >submit</button>     </div> </body> </html>

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