Randomly hanging script(JS)?

Question

I was trying to split a text and I couldn't find any functions so I tried to write one. The problem is whenever I call the function, script hangs, then gets out of memory. The most intresting part is, if I try to write that function to console, it works normal. Here is code ( the line with "*" is where script hangs )

function split(textedlol,searchdat){
textedlol = new String(textedlol);
textedlol = eval(textedlol);
var done = [];
var finddis;
do{
finddis = textedlol.indexOf(searchdat);
done.push(textedlol.substring(0,finddis - 1));
textedlol = textedlol.substr(finddis + 1);
}
while(textedlol != "" || finddis != "-1");
return done;
}

If there is any other functions that I can use please tell me.

Answer 1

You need not define your own function, as there's one already available for you. In case you have not checked this yet:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split

Answer 2

Alright I'll try to use it, but I don't understand why it hangs. Also I forgot to tag the line, it hangs at "finddis = textedlol.indexOf(searchdat)"