js:replace dont work:(

[pelegk1]

why this isnt working :
x="abcdeee";
x.replace("e","z");
alert("1:"+x);

even whne i do this :

x="abcdeee";
x.replace("z","r");
alert("2:"+x);

doesnt work!!!why???

[Jeff Mott]

The replace method does not modify the string it works on, but rather returns a new string. So...

x = x.replace("e","z");

[Fang]

The first argument has to be a regular expression.

re = /e/gi;
str = "abcdeee";
newstr=str.replace(re, "z");
document.write(newstr);

The result is "abcdzzz"