求一正则表达式。

Question

<script language="JavaScript">
<!--
var str="[yinyuan=20]alksdfjaklsdfjalsdf[/yinyuan][yinyuan=30]alksdfjaklsdfjalsdf[/yinyuan]"
var re=/\[(yinyuan)=([^\]]+)\][^\[]*\[\/\1\]/
var a=[]
while(re.test(str)){
a[a.length]=RegExp.$2
str=str.replace(re,'')
}
alert(a.join('\n'))
//-->
</script>

Answer 1

如果str = 这样呢？[YinYuan=1]
[/YinYuan]

Answer 2

<textarea name="aa">
[YinYuan=1]
[/YinYuan]
</textarea>
<script language="JavaScript" defer>
<!--
var str=aa.value.replace(/\r\n/g,'')
var re=/\[(YinYuan)=([^\]]+)\](.*?)\[\/\1\]/
var a=[]
while(re.test(str)){
a[a.length]=RegExp.$2
str=str.replace(re,'')
}
alert(a.join('\n'))
//-->
</script>