<html>
<body>
<!-- http://www.w3cfuns.com/notes/29143/79dafb7c07f6865f435af641869d3125.html -->
<script type="text/javascript">
var phoneWidth = parseInt(window.screen.width);
var phoneScale = phoneWidth/640;
var ua = navigator.userAgent;
if (/Android (\d+\.\d+)/.test(ua)){
var version = parseFloat(RegExp.$1);
// andriod 2.3
if(version>2.3){
document.write('<meta name="viewport" content="width=640, minimum-scale = '+phoneScale+', maximum-scale = '+phoneScale+', target-densitydpi=device-dpi">');
// andriod 2.3以上
}else{
document.write('<meta name="viewport" content="width=640, target-densitydpi=device-dpi">');
}
// 其他系统
} else {
document.write('<meta name="viewport" content="width=640, user-scalable=no, target-densitydpi=device-dpi">');
}
//微信去掉下方刷新栏
if(RegExp("MicroMessenger").test(navigator.userAgent)){
document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {
WeixinJSBridge.call('hideToolbar');
});
}
//rem换算
(function (doc, win) {
var docEl = doc.documentElement,
resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
recalc = function () {
var clientWidth = docEl.clientWidth;
if (!clientWidth) return;
if(clientWidth>=640){
docEl.style.fontSize = '100px';
}else{
docEl.style.fontSize = 100 * (clientWidth / 640) + 'px';
}
};
if (!doc.addEventListener) return;
win.addEventListener(resizeEvt, recalc, false);
doc.addEventListener('DOMContentLoaded', recalc, false);
})(document, window);
</script>
</body>
</html>