测试Latex

According to this page, if we put the following code in the head of html page

<script src="http://latex.codecogs.com/latex.js" type="text/javascript"></script>

it will show you the $latex$ symbols correctly, like this,

$ T:V \rightarrow W$ ,

$v \in T $ 

$ T(v) = Av \in W$

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Strangely, it does not work for the following latex sentence which is the same above buat at different locations:

$ T(v) = Av \in W$

$v \in T $ 

$ T(v) = Av \in W$

So after some search in the internet, I put the following in the head:

<script type="text/javascript" src="http://common.cnblogs.com/script/ASCIIMathML.js"></script>

And this works only on Firefox, sometimes on IE, but never works on the Google brower.