我一直在尝试制作一个包含两张图片和一个积分计数器的网页。页面加载时,选择图片 1,取消选择图片 2。如果您单击 pic1,则不会发生任何事情,但如果您单击 pic2,它会被选中,而 pic1 会被取消选中。然后,如果你点击pic2,什么也不会发生,但是如果你点击pic1,它会被选中,而pic2会被取消选择,等等。当你点击背景时,如果pic1被选中,它会加1分,如果pic2被选中,它增加了 5 分。它还应该在所选图片周围绘制一个黄色方 block 。一切正常,但我不能只让背景给出分数。我尝试了以下代码,但整点计数器停止工作。
function addPoint(number) {
points = points + number;
document.getElementById("points").innerHTML = points;
};
function pointsAmmount() {
chkBox1 = document.getElementById("picture1").checked;
addPoint(chkBox1 ? 1 : 5);
};
function checkPicture1() {
document.getElementById("picture1").checked = true;
}
function uncheckPicture1() {
document.getElementById("picture1").checked = false;
}
function addBorder1() {
document.getElementById("pic1").style.border = "5px solid yellow";
}
function addBorder2() {
document.getElementById("pic2").style.border = "5px solid yellow";
}
function removeBorder1() {
document.getElementById("pic1").style.border = "5px solid white";
}
function removeBorder2() {
document.getElementById("pic2").style.border = "5px solid white";
}
function onPageload() {
checkPicture1();
addBorder1();
removeBorder2();
}
window.onload = onPageload;
background.onmousedown = pointsAmmount;
var points = 0;
input[type=checkbox] {
display: none;
}
input[type=button] {
display: none;
}
<p align="center">Points: <span id="points">0</span></p>
<p align="center">
<label for="picture1">
<img src="eslcc_logo.png" alt="eslcc logo" id="pic1"/>
</label>
</p>
<input id="picture1" type="checkbox" onchange="checkPicture1()" onclick="
addBorder1();
removeBorder2();" />
<p align="center">
<label for="picture2">
<img src="imac.jpg" alt="iMac" id="pic2"/>
</label>
</p>
<input id="picture2" type="button" onclick="
uncheckPicture1();
addBorder2();
removeBorder1();" />
我还想指出,我不能使用jquery。
最佳答案
您可以在onmousedown
时获取目标,检查目标(被点击的元素)是否是IMG
,如果不是,则添加点。
function addPoint(number){
points = points + number;
document.getElementById("points").innerHTML = points;
};
function pointsAmmount(){
chkBox1 = document.getElementById("picture1").checked;
addPoint(chkBox1 ? 1 : 5);
};
function checkPicture1(){
document.getElementById("picture1").checked = true;
}
function uncheckPicture1(){
document.getElementById("picture1").checked = false;
}
function addBorder1(){
document.getElementById("pic1").style.border = "5px solid yellow";
}
function addBorder2(){
document.getElementById("pic2").style.border = "5px solid yellow";
}
function removeBorder1(){
document.getElementById("pic1").style.border = "5px solid white";
}
function removeBorder2(){
document.getElementById("pic2").style.border = "5px solid white";
}
function onPageload(){
checkPicture1();
addBorder1();
removeBorder2();
}
window.onload = onPageload;
document.getElementsByTagName('html')[0].onmousedown = function(e) {
if(e.target.tagName!="IMG") pointsAmmount();
}
var points = 0;
input[type=checkbox]{
display:none;
}
input[type=button]{
display:none;
}
html {
height: 100%;
}
<p align="center">Points: <span id="points">0</span></p>
<p align="center"><label for="picture1"><img src="eslcc_logo.png" alt="eslcc logo" id="pic1"/></label></p>
<input id="picture1" type="checkbox" onchange="checkPicture1()" onclick="addBorder1(); removeBorder2();"/>
<p align="center"><label for="picture2"><img src="imac.jpg" alt="iMac" id="pic2"/></label></p>
<input id="picture2" type="button" onclick="uncheckPicture1(); addBorder2(); removeBorder1();" />
关于javascript - 如何让背景可点击?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42897657/