Question

js替换中文字符串问题

msg = msg+''.replace(/元整 /,"");
alert(msg);
msg是大写的金额。想把元整替换成空，但是不起作用，跟编码有问题？
错了是这样写的：

msg = msg.replace(/元整 /,"");
alert(msg);

Answer 1

JavaScript中replace() 方法如果直接用str.replace("-","!") 只会替换第一个匹配的字符.
而str.replace(/\-/g,"!")则可以全部替换掉匹配的字符(g为全局标志)。
replace()
The replace() method returns the string that results when you replace text matching its first argument
(a regular expression) with the text of the second argument (a string).
If the g (global) flag is not set in the regular expression declaration, this method replaces only the first
occurrence of the pattern. For example,
var s = "Hello. Regexps are fun." ;s = s.replace(/\./, "!" ); // replace first period with an exclamation pointalert(s);
produces the string “Hello! Regexps are fun.” Including the g flag will cause the interpreter to
perform a global replace, finding and replacing every matching substring. For example,
var s = "Hello. Regexps are fun." ;s = s.replace(/\./g, "!" ); // replace all periods with exclamation pointsalert(s);
yields this result: “Hello! Regexps are fun!”
所以可以用以下几种方式.：
string.replace(/reallyDo/g, replaceWith);
string.replace(new RegExp(reallyDo, 'g'), replaceWith);
string：字符串表达式包含要替代的子字符串。
reallyDo：被搜索的子字符串。
replaceWith：用于替换的子字符串。
Js代码
<script type="text/javascript">
String.prototype.replaceAll = function(reallyDo, replaceWith, ignoreCase) {
if (!RegExp.prototype.isPrototypeOf(reallyDo)) {
return this.replace(new RegExp(reallyDo, (ignoreCase ? "gi": "g")), replaceWith);
} else {
return this.replace(reallyDo, replaceWith);
}
}
</script>

Answer 2

没问题啊。

var msg = "伍拾元整";
msg = msg.replace(/元整/,'')
alert(msg);

追问

不知道怎么，我用msg.replace(‘元整’,'')就解决了

Answer 3

replaceAll("(?i)[^a-zA-Z0-9\u4E00-\u9FA5]", "");
这个不行 把所有的都替成空了应该
你截取字符串不行么
从后面两位开始截取 一直截到最前
或者从最前开始 截到倒数两位