chrome 扩展开发
<html> <head> <script> // Called when the url of a tab changes. function checkForValidUrl(tabId, changeInfo, tab) { // If the letter 'g' is found in the tab's URL... if (tab.url.indexOf('g') > -1) { // ... show the page action. chrome.pageAction.show(tabId); } }; // Listen for any changes to the URL of any tab. chrome.tabs.onUpdated.addListener(checkForValidUrl); </script><script type="text/javascript">//init functionfunction init(){ }</script></head> <body onLoad="init();"></body> </html>