Remove all non-digit characters from a string jquery? [duplicate]

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Possible Duplicate:

Javascript: strip out non-numeric characters from string

String matching is headache for me.

Example:

If I have strings like these:

abc123xyz456()*
^%$111u222

Then convert it to:

123456
111222

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How about regular expressions?

Try something something like:

'abc123xyz456()*'.replace(/\D/g,'') 

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<input id='num' value='hgjhGJHGt7y67ihgGUT&6tb.,.,z.oy8'/>


$('#num').val($('#num').val().replace(/[^\d]/g, ""));