How to find character appearence in text

How can i find with jquery how many times a character开发者_开发百科 appear in text, for example i have the character 1 and the text 143443143241 so here the character 1 appear 3 times, how can i check that.

var blah = "143443143241";
var count = (blah.match(/1/g) || []).length; // <-- returns the number of occurrences. 3 in this case.

"143443143241".match(/1/g).length

Edit: What Joseph said 40 seconds before me.

This is just a javascript question, or a generic programming question.

function countOccurences(string, testChar) { 
    var count = 0;
    for(var i = 0; i<string.length; i++){
        if(string[i] == testChar) { count++; }
    }
    return count;
}

countOccurences("143443143241", "1");