javascript实现repalceAll

Question

a = "testtesttest http://baidu.com，http://baidu.com,test"
rgx=/(<a.)?((((http|ftp|https)://)|(www.))+[w-_]+(.[w-_]+)+([w-.,@?^=%&:/~+#][w-@?^=%&/~+#])?)('?>?.*</a>)?([/]|[W])/gi;

a.replace(rgx, "~hh~")

想要的效果是是"testtesttest ~hh~，~hh~,test"
实际上只替换掉了第一个，如何实现全部替换呢？

Answer 1

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);
}

};

---

// eg:
var a = "aaabbbbaaabbcccbdddd";
// 把所有的"a"替换为"v"
a = a.replaceAll("a","v");

Answer 2

'哈哈哈-sss-fdf-蛤蛤蛤'.replace(/-/g,"")

Answer 3

String.prototype.replaceAll = function(s1, s2){
    return this.replace(new RegExp(s1, 'gm'),s2);
};