这是为什么？var str = "abbbbbbaaaa";

Question

var str = "abbbbbbaaaa";
var s=str.replace(/b/g," ");
window.alert(s);

Answer 1

try
--------------------------------
var str = "abbbbbbaaaa";
var s=str.replace(/b/gi," ");
window.alert(s);

Answer 2

<script type="text/javascript">
String.prototype.replace = function(a, b){return this.split(a).join(b);};
var s="aaabbbbbccc";
s=s.replace("b"," ");
alert(s);
</script>重写replace方法