jQuery Button to check all checkboxes disappers on start -


why button disappearing on start ? want check , uncheck alls checkboxes 1 button. can't solution.

<!doctype html> <html> <head> <meta charset="utf-8"> <title>unbenanntes dokument</title> <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> </head>  <body> <script type="text/javascript"> $(document).ready(function(){     $('.check:button').toggle(function(){         $('input:checkbox').attr('checked','checked');     },function(){         $('input:checkbox').removeattr('checked');               }) }) </script> <div id="button"> <input type="button" class="check" value="check all" /> </div> <div id="check">    <input type="checkbox"  /> checkbox  1    <input type="checkbox" /> checkbox  2    <input type="checkbox"  /> checkbox  3 </div> </body> </html> 

try this:

$("#checkall").click(function () {      $('#check input:checkbox').not(this).prop('checked', this.checked);   }); 

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