inserting characters into a string

I'll think you would need to make your own but it shouldn't be to difficult using substring and indexoff etc. I haven't seen one function to do that anyways :)

I'd think you could even make on using regular expression if needs be, but I'd think using substrings to build the new string would be easier.

yea, i agree it wouldn`t be difficult. Wonder why they didn`t add a built in function for this commonly required feature
Commonly required? I wouldn't exactly call it commonly required.

function addLet(let, str, after) {
// let is the X
// str is the abcdefg
// after would be 3
return str.substr(0,after) + let + str.substr(after+1);
}or if you want the much cooler prototype way:String.prototype.addLet = function(let, after) {
// let is the X
// after would be 3
return this.substr(0,after) + let + this.substr(after+1);
}Call this as "abcdefg".addLet('X',3);

I think they'll both work