使用 javascript 创建一个开/关按钮
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时间：2020-10-25 19:25:03 来源:igfitidea点击:
Creating an ON/OFF button with javascript
提问by saeed
Place a single button on a page that could be used as an ON/OFF switch. Design this button so that the button is labeled "ON". When you click on the button its label should change to "OFF". Clicking on it again should change it back to "ON" and so on.
在页面上放置一个可用作 ON/OFF 开关的按钮。设计此按钮，以便将按钮标记为“ON”。当您单击按钮时，其标签应更改为“关闭”。再次单击它应该将其更改回“ON”等。
回答by
This ok?:
这好吗？：
<script type="text/javascript">
function onoff(){
currentvalue = document.getElementById('onoff').value;
if(currentvalue == "Off"){
document.getElementById("onoff").value="On";
}else{
document.getElementById("onoff").value="Off";
}
}
</script>
<input type="button" value="On" id="onoff" onclick="onoff();">
