如何解决表单依旧提交即使监听处理函数返回false

<form action="http://www.example.com" id="form">
    <input type="text" />
    <input type="submit" />
</form>

<script>
var code = function () {
    return false;
};
var element = window.document.getElementById("form");
if (element.addEventListener) {
    element.addEventListener("submit", code, false);
}
</script>

修改后的Code:

<form action="http://www.example.com" id="form">
    <input type="text" />
    <input type="submit" id="btnSubmit" name="btnSubmit" value="Submit" />
</form>

<script>
var code = function (eventObject) {    
    if (eventObject.preventDefault) {
        eventObject.preventDefault();
    } else if (window.event) /* for ie */ {
        window.event.returnValue = false;
    }
    return true;
};

window.onload = function(){
var element = window.document.getElementById("form");
if (element.addEventListener) {
    element.addEventListener("submit", code, false);
} else if (element.attachEvent) {
    element.attachEvent("onsubmit", code);
}
}
</script>

 

 备注:

1:preventDefault函数的使用请参考 https://developer.mozilla.org/en/DOM/event.preventDefault
2:DOM Events :http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-Event-preventDefault