移动端游览器自适应代码

 1 <script type="text/javascript">// <![CDATA[
 2 var jsVer = 28;
 3 
 4         var phoneWidth = parseInt(window.screen.width);
 5 
 6         var phoneScale = phoneWidth / 640;
 7 
 8         var ua = navigator.userAgent;
 9 
10         if (/Android (\d+\.\d+)/.test(ua)) {
11 
12             var version = parseFloat(RegExp.$1);
13 
14             // andriod 2.3
15 
16             if (version > 2.3) {
17 
18                 document.write(‘<meta name="viewport" content="width=640, minimum-scale = ‘ + phoneScale + ‘, maximum-scale = ‘ + phoneScale + ‘, target-densitydpi=device-dpi">‘);
19 
20                 // andriod 2.3以上
21 
22             } else {
23 
24                 document.write(‘<meta name="viewport" content="width=640, target-densitydpi=device-dpi">‘);
25 
26             }
27 
28             // 其他系统
29 
30         } else {
31 
32             document.write(‘<meta name="viewport" content="width=640, user-scalable=no, target-densitydpi=device-dpi">‘);
33 
34         }
35 // ]]></script>