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 1.×Ôhttp://jorkin.reallydo.com/article.asp?id=275
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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!”
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string.replace(/reallyDo/g, replaceWith);
string.replace(new RegExp(reallyDo, 'g'), replaceWith);
string£º×Ö·û´®±í´ïʽ°üº¬ÒªÌæ´úµÄ×Ó×Ö·û´®¡£
reallyDo£º±»ËÑË÷µÄ×Ó×Ö·û´®¡£
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<mce: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);
}
}
// --></mce:script>
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Ô­ÎĵØÖ·: http://jorkin.reallydo.com/article.asp?id=275

2.×Ôhttp://yueguangyuan.javaeye.com/blog/31744
·½·¨£º string.replace(new RegExp(oldString,"gm"),newString))
gm     g=global, m=multiLine  £¬  ´óÖÂÉÏ·½·¨¾ÍÊÇÕâÑùµÄ£¬¿ÉÒÔʵÏÖ