Get the highest and lowest values of a certain attribute in jQuery or Javascript

Question

I have the following divs:

test
test


        
      

Answer 1

var min = Number.MAX_VALUE, max = Number.MIN_VALUE;
$(".maindiv").each(function () {
    var id = parseInt(this.id, 10);
    if (id > max) {
        max = id;
    }
    if (id < min) {
        min = id;
    }
});