js正则表达式怎么取出个字符串中的所有数字？ 删除字符串中的数字，JavaScript正则表达式怎么写？
js\u6b63\u5219\u8868\u8fbe\u5f0f\u600e\u4e48\u53d6\u51fa\u4e2a\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u6570\u5b57\uff0c\u6025\u6025\u6025\u5bf9\u4e8e\u5b57\u7b26s\uff0c\u5229\u7528\u6b63\u5219\u5339\u914d \uff1avar num = s.replace(/[^0-9]/ig, "")\u3002
js\u6b63\u5219\u8868\u8fbe\u5f0f\u8bed\u6cd5\uff1a
\u6b63\u5219\u8868\u8fbe\u5f0f\u6709\u4e24\u79cd\u5f62\u5f0f\uff0c\u4e00\u79cd\u662f\u666e\u901a\u65b9\u5f0f\uff0c\u4e00\u79cd\u662f\u6784\u9020\u51fd\u6570\u65b9\u5f0f\u3002
\u666e\u901a\u65b9\u5f0f\uff1avar reg=/\u8868\u8fbe\u5f0f/\u9644\u52a0\u53c2\u6570\u8868\u8fbe\u5f0f\uff1a\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u4ee3\u8868\u4e86\u67d0\u79cd\u89c4\u5219\uff0c\u5176\u4e2d\u53ef\u4ee5\u4f7f\u7528\u67d0\u4e9b\u7279\u6b8a\u5b57\u7b26\uff0c\u6765\u4ee3\u8868\u7279\u6b8a\u7684\u89c4\u5219\uff0c\u540e\u9762\u4f1a\u8be6\u7ec6\u8bf4\u660e\u3002\u9644\u52a0\u53c2\u6570\uff1a\u7528\u6765\u6269\u5c55\u8868\u8fbe\u5f0f\u7684\u542b\u4e49\uff0c\u76ee\u524d\u4e3b\u8981\u6709\u4e09\u4e2a\u53c2\u6570\uff1ag\uff1a\u4ee3\u8868\u53ef\u4ee5\u8fdb\u884c\u5168\u5c40\u5339\u914d\u3002i\uff1a\u4ee3\u8868\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u5339\u914d\u3002m\uff1a\u4ee3\u8868\u53ef\u4ee5\u8fdb\u884c\u591a\u884c\u5339\u914d\u3002
\u9a8c\u8bc1\u7528\u6237\u5bc6\u7801\uff1a"^[a-zA-Z]\w{5,17}$"\u6b63\u786e\u683c\u5f0f\u4e3a\uff1a\u4ee5\u5b57\u6bcd\u5f00\u5934\uff0c\u957f\u5ea6\u57286~18\u4e4b\u95f4\uff0c\u53ea\u80fd\u5305\u542b\u5b57\u7b26\u3001\u6570\u5b57\u548c\u4e0b\u5212\u7ebf\u3002\u9a8c\u8bc1\u662f\u5426\u542b\u6709^%&',;=?$\"\u7b49\u5b57\u7b26\uff1a"[^%&',;=?$\x22]+"\u3002\u53ea\u80fd\u8f93\u5165\u6c49\u5b57\uff1a"^[\u4e00-\u9fa5]{0,}$"\u9a8c\u8bc1Email\u5730\u5740\uff1a"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$"\u3002\u9a8c\u8bc1InternetURL\uff1a"^http://([\w-]+\.)+[\w-]+(/[\w-./?%&=]*)?$"\u3002\u9a8c\u8bc1\u7535\u8bdd\u53f7\u7801\uff1a"^(\(\d{3,4}-)|\d{3.4}-)?\d{7,8}$"\u6b63\u786e\u683c\u5f0f\u4e3a\uff1a"XXX-XXXXXXX"\u3001"XXXX-XXXXXXXX"\u3001"XXX-XXXXXXX"\u3001"XXX-XXXXXXXX"\u3001"XXXXXXX"\u548c"XXXXXXXX"\u3002\u9a8c\u8bc1\u8eab\u4efd\u8bc1\u53f7\uff0815\u4f4d\u621618\u4f4d\u6570\u5b57\uff09\uff1a"^\d{15}|\d{18}$"\u3002\u9a8c\u8bc1\u4e00\u5e74\u768412\u4e2a\u6708\uff1a"^(0?[1-9]|1[0-2])$"\u6b63\u786e\u683c\u5f0f\u4e3a\uff1a"01"\uff5e"09"\u548c"1"\uff5e"12"\u3002\u9a8c\u8bc1\u4e00\u4e2a\u6708\u768431\u5929\uff1a"^((0?[1-9])|((1|2)[0-9])|30|31)$"\u6b63\u786e\u683c\u5f0f\u4e3a\uff1b"01"\uff5e"09"\u548c"1"\uff5e"31"\u3002 \u5339\u914d\u4e2d\u6587\u5b57\u7b26\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a [\u4e00-\u9fa5]
//\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u6570\u5b57\u3002
function trimNumber(str){
return str.replace(/\d+/g,'');
}
alert(trimNumber("1a2b3c4d"));
对于字符s，利用正则匹配 ：var num = s.replace(/[^0-9]/ig, "")。
console.log(str.replace(/[^0-9]+/g, ''))
var str= '00asfasdfasdf3435asdas874747474asdf'
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