BOM(Browser Object Model)
Window-> 对应整个窗口
Document -> DOM
Location -> location.href = "网址";
Navigator -> userAgent
```
<!DOCTYPE html>
<html>
<script>
function browserRedirect() {
var sUserAgent = navigator.userAgent.toLowerCase();
var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
var bIsMidp = sUserAgent.match(/midp/i) == "midp";
var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
var bIsAndroid = sUserAgent.match(/android/i) == "android";
var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
if (!(bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) ){
window.location.href="http://blog.csdn.net/zml_2015";
} else {
window.location.href="http://m.blog.csdn.net/blog/index?username=zml_2015";
}
}
browserRedirect();
</script>
<body>
</body>
</html>
```
History-> 操作前进后退按钮
后退: history.go(-1), history.back()
前进: history.go(1), history.forward();
Screen-> screen.width, screen.height, screen.availWidth, screen.availHeight.
