Regex to test string in javascript
<p>I want to create regex for javascript to test string contain word like M.C.A or ACA etc.Regex should return true when these words entered like M.C.A, USD etc.
Regex should return false when enter string  in textbox like</p>

<pre><code> .M.C.A
 ..MM
 M..........A
 M.C.A..
</code></pre>

<p>I can enter any word with dot or without dot but didn't want to enter string in textbox which
1: start with dot 
2: contain more than one dot between each letter
3: not contain any number
4: start with letter only </p>
