Stringing Things Along - Search And Destroy
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You can also search for specific patterns in your strings with regular expressions, via the String object's search() method. Here's an example:

<script language="JavaScript">
var str = "johndoe@somedomain.com";
var pattern =
/^([a-zA-Z0-9])+([\.a-zA-Z0-9_-])*@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-]+)+/;
// returns 0
alert(str.search(pattern));
</script>

The search() method returns the position of the substring matching the regular expression, or -1 if no match exists.

You can also perform a search-and-replace operation with the replace() method, which accepts both a regular expression and the value to replace it with. Here's how:

<script language="JavaScript">
// set string
var str = "yo ho ho and a bottle of gum";
// returns "yo ho ho and a bottle of rum" alert(str.replace(/gum/gi,
"rum"));
</script>

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