提交按钮不将表单数据发送到mysql - jquery问题

My jquery validation script is below. When i click the submit button it does not submit the form data to mysql. The submit button is called submit. If I remove the jquery validation script it submits to mysql so it is an issue with the validation script.

Jquery Validation script:

$(function() {
    function validate(id) {
        var enabled = ($("input[name='attendance" + id + "']:checked").val() == 'Yes');
        if (enabled) {
            //Please select option is selected              
            if ($("#food" + id)[0].selectedIndex == 0 || $("#drink" + id)[0].selectedIndex == 0) {
                alert('Please select color');
                return false;
            }
        }
        return true;
    };

    $("input[name^='attendance']").click(function(e) {

        var id = this.name.replace('attendance', '');
        $("#food" + id + ", #drink" + id).prop("disabled", this.value == 'No');
        validate(id);
    });

    $("input:submit").click(function(event) {

        event.preventDefault();
        var retVal = false;
        $.each([1, 2], function(i, val) {
            retVal = (validate(val) || retVal);
        });
        if (retVal) {
            $('list').submit();
        }
    });
});

submit button:

<input type="submit" name="submit" id="submit" value="Submit" />

form data:

<form name="colour" action="" method="post" id="list">

The selector in the submit() is incorrect. You're looking for the form by its id, list. Your selector is looking for tags called <list>.

if(retVal){$('list').submit();}
// Should be
if(retVal){$('#list').submit();}

if (retVal) {
  document.getElementById('list').submit();
}

Update 2:

Instead of binding this to the submit button's .click(), bind it to the form's .submit() and return true or false:

// Bind to the form's .submit()
$("#list").submit(function(event) {
    event.preventDefault();
    var retVal = false;
    $.each([1, 2], function(i, val) {
        retVal = (validate(val) || retVal);
    });
    // return the true/false to the submit action
    // false will prevent submission.
    return retVal;
});