418408 - testing a string for a numeric value with regular expression returns alternate true and false

Status: RESOLVED DUPLICATE of bug 98409

(Firefox :: General, defect)

Description

[RonJonk]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12

Using the regular expression /[\D]/g or [^0-9] in javascript it returns false if testing for instance string "3a" but when I execute the test the second time it returns true. This result alternates true and false for every time I execute this test expression.

Reproducible: Always

Steps to Reproduce:
1. create test expression: 
function isNumeric(str){
	var re = /[\D]/g
	if (re.test(str)) alert('false');
	else alert('true');
}
2.execute script with string nonnumeric for instance '3a'
3.execute it a second time
Actual Results:  
alerts true ,alerts false, alerts true ,alerts false,  etc..

Expected Results:  
should always alert false