我使用JSP創建了一個Web項目,該JSP基於從servlet中獲取的值創建表單。我試圖將一個eventListener添加到一些複選框,在最基本的情況下,在選中或取消選中時會彈出一個警告框。JavaScript/JSP - 爲什麼「CheckboxStateChange」eventListener不工作?
JSP:
<c:if test="${type == 'impactedSite'}">
<div id="${type}">
<div id="products">
<h4>Product:</h4>
<input class="checkBoxes" type="checkbox" name="product" value="Anaesthetic"> Anaesthetic<br />
<input class="checkBoxes" type="checkbox" name="product" value="Analgesic"> Analgesic<br />
<input class="checkBoxes" type="checkbox" name="product" value="Antacid"> Antacid<br />
</div>
<div id="processes">
<h4>Process:</h4>
</div>
<div id="equipment">
<h4>Equipment:</h4>
</div>
</div><br /><br />
</c:if>
的JavaScript:
if(document.getElementById("impactedSite")){
var anaesthetic = ["a", "b", "c"];
var analgesic = ["d", "e"];
var antacid = ["f", "g"];
var processesElement = document.getElementById("processes");
var checkBoxes = document.getElementsByClassName("checkBoxes");
for(var i = 0; i < checkBoxes.length; i++){
alert("Checkbox" + i);
checkBoxes[i].addEventListener("CheckboxStateChange", function(event){
var checkbox = event.target;
if (checkbox.checked) {
alert ("The check box is checked.");
}
else {
alert ("The check box is not checked.");
}
}, false);
}
}
我<script>
標籤聲明最後在<body>
。循環中的警報(alert("Checkbox" + i);
)工作正常,只是檢查並取消選中框不會引發警報。
This works。我應該想到這一點。 – NeedsHelp