Deselect all checkboxes when returning to the previous page

As you have not reported if you are using jquery as a framework in your project, I am considering that yes, otherwise edit the code for your needs

<input type="checkbox" checked='true' class='check' name="tecnologia" value="java"/>JAVA
<input type="checkbox" checked='true' class='check' name="tecnologia" value="html"/>HTML
<input type="checkbox" checked='true' class='check' name="tecnologia" value="css"/>CSS
<input type="checkbox" checked='true' class='check' name="tecnologia" value="javascript"/>JAVASCRIPT

After reading the DOM, perform a function by callback to uncheck:

$(document).ready(function(){
    $(".check").removeAttr("ckecked");     
}

remembering what to use in onready so you do not have a chance to try to remove the checked attribute without loading the html correctly.

A simple addition of jQuery code unchecks everything both in page loading and back to it:

$("input[type='checkbox']").prop('checked', false);

If checkbox has class in common:

$("input.class").prop('checked', false); or $(".class").prop('checked', false);

Or belong to a div with a id :

$("#div input[type='checkbox']").prop('checked', false);

Or a single form on the page:

$("form input[type='checkbox']").prop('checked', false);

  

Note that the .removeAttr and .attr methods do not work for   change checked or disabled properties in newer versions   of jQuery.

When the page loads, use the code below on the page

For jQuery version < 1.6

$(document).ready(function(){
  $("checkbox").attr('checked', false);
});

For jQuery version > 1.6

$('#myCheckbox').prop('checked', false);