1. Understanding JavaScript Events
The HTML document binds the common events of the element (such as onlick, onmouseover, etc.) as attributes on the HTML element. When a specific event of the element occurs,
The event handler corresponding to this particular event is executed and the result is returned to the browser. Event bundling causes specific code to be placed in the event handler of the object in which it resides.
2. Small problems at runtime
js is a script, so this phenomenon occurs, right-click on a single machine and select Allow to appear
Click Yes and that's it. You can see what you want.
2. Bind the click event for the button
1. The effect is as shown in the figure
2. The code is as follows
<html>
<head><title>事件处理器</title>
<script type="text/javascript" >
window.onload=function(){
var btn=document.getElementById('btnSubmit');
btn.onclick=function(){
alert('你点击了'+this.value+'按钮');
}
}
</script>
</head>
<body>
<input type="button" id="btnSubmit" value="提交" />
</body>
</html>
3. Explanation
This part uses anonymous functions: function defines an anonymous function bound to the onload event.