javascript - How to disable dropdowns and buttons based on the value of a column in a table -

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i have table set of columns fetching values database along dropdown , button in each row. depending on value of 1 of columns(year), dropdown (salary) , button (update) need disabled.

i tried 2 different approaches using javascript , jquery. both don't seem work.

1) tried triggering event on pageload using javascript

<body onload="dropdowndisabler();">

javascript part:

function dropdowndisabler() {     if ($("#year").val() >= 2005)     {                     $("#salary").enabled=false;                     $("#update").enabled=false;     }  }

2) tried matching year column elements have criteria using jquery:

if($('#year').val() >= 2005) {      $(this).find("#salary").prop('disabled',true);      $(this).find("#update").prop('disabled',true); }

you can iterate on rows, check value of year , set disabled property on select , button element in row:

$(document).ready(function() {      $("#updatesalary tbody tr").each(function( index ) {          var $this = $(this);         if ($this.children("td:first").text() >= 2005 ) {            $this.find("select, button").prop("disabled", true);         }      });  });

jsfiddle demo

note since have multiple rows (i assume), should not use ids elements, id's must unique on each document. use classes though more target elements within each row, e.g. <td class="year">2004</td>


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