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- function randStr(len, chars) {
- len = len || 6;
- chars = chars || '1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM';
- var ret = '';
- while (len--) {
- ret += chars.charAt(Math.random() * chars.length);
- }
- return ret;
- }
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