使用jquery导航dom以获取特定元素

这样的办法应该行得通。(未测试精确语法,但算法可靠。)

// Bind an event to each of your checkboxes, for when they are clicked
$("input[type=checkbox]").click(function() {
  if ($(this).attr("checked")) {
    // The checkbox is checked, so find the associated text input and change its value
    $(this).parents(".selectItem").find("input[type=text]").val("1");
  } else {
    // The checkbox is unchecked, so find the associated text input and remove its value
    $(this).parents(".selectItem").find("input[type=text]").val("");
  }
});

// Bind an event to each of your text inputs, for when they have text entered into them
$("input[type=text]").keypress(function() {
  if ($(this).val() != "")) {
    // There is something in the text input box, so check the associated checkbox
    $(this).parents(".selectItem").find("input[type=checkbox]").attr("checked","checked");
  } else {
    // There is nothing in the text input box, so uncheck the associated checkbox
    $(this).parents(".selectItem").find("input[type=checkbox]").attr("checked","");
  }
});

$(document).ready(function() {
    $('input:checkbox').change(function() {
        if($(this).is(':checked')) {
            $(this).val('1');
        } else {
            $(this).val('');
        }
    });

    $('input[type=text]').keyup(function() {
        if($(this).val() != "") {
            $(this).parent()
                   .parent()
                   .next('.selectIt')
                   .find('span > input:checkbox')
                   .attr('checked','checked')
                   .val('1');
        } else {
            $(this).parent()
                   .parent()
                   .next('.selectIt')
                   .find('span > input:checkbox')
                   .removeAttr('checked')
                   .val('');
        }
    });
});