javascript replace all occurrences

var res = str.replace("find", "replace");

function replaceAll(str, find, replace) {
    var escapedFind=find.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
    return str.replace(new RegExp(escapedFind, 'g'), replace);
}
//usage example
var sentence="How many shots did Bill take last night? That Bill is so crazy!";
var blameSusan=replaceAll(sentence,"Bill","Susan"); 

str.split(search).join(replacement);

str = str.replace(/abc/g, '');

str = str.replace(new RegExp('abc', 'g'), 'xyz');