html5中canvas知识积累2---判断浏览器是否支持canvas
判断浏览器是否支持canvas，具体代码如下：
<!DOCTYPE html><head><meta charset=utf-8 /><title>canvas</title><script type='text/javascript'>window.onload = function(){/**判断浏览器是否支持canvas**/try{document.createElement('canvas').getContext('2d');var addDiv = document.createElement('div');addDiv.innerHTML='支持canvas';document.body.appendChild(addDiv);}catch(e){var addDiv = document.createElement('div'); addDiv.innerHTML='浏览器不支持canvas';document.body.appendChild(addDiv); } }; </script> </head><body></body></html>