unnecessary global variables in color_field.query.js

Id and value variables are global, this variables could override other javascript variables, as this is not needed attaching a patch to make this variables local.

file: color_field.query.js

 id = selector.replace("#div","edit");
 value = $('#' + id).val();

to

  var id = selector.replace("#div","edit");
  var value = $('#' + id).val();