0
作为javascript中的新手,我在编写If语句时遇到问题,第四回合后发生事件。我希望在用户点击四个选项后弹出提醒。我添加了计数器变量“转”到输出,所以我可以看到它是否正确计数,但它没有。if语句计数器变量混淆javascript
var question1 = new Array();
var turns = 0;
window.onload = function() {
var eSelect = document.getElementById('question1');
var optOtherReason = document.getElementById('displayresponse');
var options = document.getElementsByTagName("option");
eSelect.onchange = function() {
var li = document.createElement("li");
li.innerHTML = options[eSelect.selectedIndex].innerHTML;
var ol = document.getElementById("appendedtext");
ol.appendChild(li);
question1.push(li.innerHTML);
var x = document.getElementById("display");
x.innerHTML = question1 + turns;
turns + 1;
}
if (eSelect.selectedIndex == 3) {
optOtherReason.style.display = 'block';
turns - 1;
}
if (turns = 4) {
alert("hey your turn is over")
}
}
<select id="question1" name="question">
<option value="x">Reason1</option>
<option value="y">Reason2</option>
<option value="other">Otherreason</option>
<option value="none">None</option>
</select>
<br>
<div id="displayresponse" style="display:none;">If you did not see a choice here, you may search for other sites.</div>
<ol id="appendedtext"></ol>
<div id="display"></div>
什么是** 2'='**?你的意思是'=='? –
是的,现在应该更清楚 – juvian
'评估表达式'你的意思是比较两个表达式吗? –