javascript - Trying to enable/disable a textfield on checkbox click -

i'm trying code text field disabled when check box 'checked'.

below code i'm using. have no bloody idea why it's not working. suspect may wordpress' fault i'm new javascript i'm hoping it's that.

<script type="text/javascript"> $('input[name=addresscheck]').change(function(){     if($(this).is(':checked')) {         $("#dbltext").removeattr('disabled');     }     else{        $("#dbltext").attr('disabled','disabled');     }      }); </script>    <input name="addresscheck" type="checkbox" id="addresscheck" /><br /> <input type="text" id="dbltext" disabled/> 

the script runs before browser sees rest of page, element never found, nothing gets bound

try

$(document).ready(init); // or document.addeventlistener('domcontentloaded', init); function init(){     $('input[name=addresscheck]').change(function(){     if($(this).is(':checked')) {       $("#dbltext").removeattr('disabled');     }     else{       $("#dbltext").attr('disabled','disabled');     }     }); } 

or move script end of body