count randomly generated element from an array?

Question

I have a problem as such:

i = [
    'pic1.gif',
    'pic2.gif'
];

I generate a random sequence of n pictures from the two pictures as such:

a = function(n){
    str = '<div>'

    for(i = 0; i < n; i++){
        str += '<img src="'+ /*randomElement of array i*/ +'">';
    }

    str += '<div>';

    return str;
}

What I need to do now is how to count the number of pic1 generated?

Answer 1

if you know the name of the pic, and if does not change, we can find the count using simple variable

a = function(n){
str = '<div>'
**//adding a temp variable**
count_img =0;
for(i = 0; i < n; i++){
    str += '<img src="'+ /*randomElement of array i*/ +'">';
    **//check the image name
    if(imagename matches){
         //increment the count
         count_img = count_img +1;
    }**
}

**console.log(count_img);**
str += '<div>';

return str;

}