p73
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <div style="width: 300px; height: 300px; background: red;"> <div style="width: 200px; height: 200px; background: blue;"></div> </div> </body> <script type="text/javascript"> var oDiv = document.getElementsByTagName("div"); oDiv[0].onclick=function(){ alert('a'); } oDiv[1].onclick=function(e){ var evt = e || event; //ie阻止冒泡 //evt.cancelBubble = true; //w3c: evt.stopPropagation(); alert('b'); } </script> </html>