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extract decimal number from alphanumeric string

ram baveja
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Joined: Apr 30, 2012
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I want to extract decimal number 265.12 or 0.0 from alphanumeric string (say amount) having value $265.12+ or $265.12- or $0.0+ or $0.0- and use it apply struts logic tag in jsp. Not sure how to extract number maybe with help of javascript? Need quick help
 
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