<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div id="box">
<button id="start" type="button" onclick="myStart()" > Start</button>
<script>
function myStart() {
document.getElementById("start").style.display="none";
var rosso = casuale(0,1);
if (rosso==0) {
var imgtest1= document.createElement("input");
imgtest1.src="http://www.w3schools.com/tags/logo_w3s.gif";
imgtest1.type="image";
imgtest1.style.height="50px";
imgtest1.style.width="50px";
imgtest1.style.position="absolute";
imgtest1.style.top="300px";
imgtest1.style.left="0px";
imgtest1.onclick= function() { document.getElementById("box").removeChild(imgtest1)
}
document.getElementById("box").appendChild(imgtest1);
}
else {
var imgtest1= document.createElement("input");
imgtest1.src="https://s3.amazonaws.com/impressivewebs/2014-02/w3schools-logo.jpg";
imgtest1.type="image";
imgtest1.style.height="50px";
imgtest1.style.width="50px";
imgtest1.style.position="absolute";
imgtest1.style.top="300px";
imgtest1.style.left="0px";
imgtest1.onclick= function() { document.getElementById("box").removeChild(imgtest1)}
document.getElementById("box").appendChild(imgtest1);
}
}
function casuale(min, max) {
return Math.floor(Math.random() * (max - min + 1) + min);
}
</script>
</div>
</body>
&#13;
我对此代码有点问题:
var rosso = casuale(0, 3)
if (rosso == 0) {
var imgtest1 = document.createElement("input");
imgtest1.src = "graphic/badtarget.png";
imgtest1.type = "image";
imgtest1.style.height = "50px";
imgtest1.style.width = "50px";
imgtest1.style.position = "absolute";
imgtest1.style.top = "300px";
imgtest1.style.left = "0px";
imgtest1.onclick = function() {
error++;
checkerror();
}
document.getElementById("box").appendChild(imgtest1);
} else {
var imgtest1 = document.createElement("input");
imgtest1.src = "graphic/goodtarget.png";
imgtest1.type = "image";
imgtest1.style.height = "50px";
imgtest1.style.width = "50px";
imgtest1.style.position = "absolute";
imgtest1.style.top = "300px";
imgtest1.style.left = "0px";
imgtest1.onclick = function() {
point++;
document.getElementById("box").removeChild(imgtest1);
if (point == maxp) {
livello2(7);
cleartarget();
}
}
document.getElementById("box").appendChild(imgtest1);
}
当我试图移除孩子时,&#34; imgtest1&#34;使用goodtarget.png图像我没有问题,相反,当我想用badtarget.png图像删除孩子按钮留在这里,没有办法删除它。为什么会这样?有办法解决这个问题吗?如果需要,我可以发布其他代码行。 感谢
编辑:很抱歉浪费你的时间,在代码片段中代码按预期工作(绿色和蓝色图像都可以消失),但在我的程序中不能。 我用于删除子代的代码行是应该在级别结束时调用的函数:
var myNode = document.getElementById("box");
while (myNode.firstChild) {
myNode.removeChild(myNode.firstChild);
}
此函数无法移除使用&#34; imgtest1.src =&#34; graphic / badtarget.png&#34;;&#34;创建的对象。 谢谢你的时间