如果是把汉字代码转为汉字，可以使用String.fromCharCode(字符的Ascii码)，就可实现将ascii码转换成字符。
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>
