Snake webgame_javascript techniques implemented by javascript to support multiple browsers

I was so tired from writing, it took me 3 hours to write! You can play with it and see
The interface is not beautiful, but you can criticize it

<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>www.jb51.net Script House Snake</title> <style type="text/css"> <!-- body { margin-left: 0px; margin-top: 0px; } #global { margin:auto; position: relative; width: 800px; height:500px; border: thick double #ff0000; background-color:#666666 } #global #p { background-color: #999999; position: absolute; height: 500px; width: 500px; left:0px; top:0px; border-right-width: thick; border-right-style: double; border-right-color: #FF0000; } #global #p #k { background-color: #0000FF; position: absolute; height: 25px; width: 25px; left:0px; top:0px; } #global #p .xin { position: absolute; height: 25px; width: 25px; } --> </style> <div id="global"> <div id="p" style="top:0px; left:0px;"> <div id="k"> </div> </div> </div>