js_cron.js

// jsCron - by Andrés Nieto

var jsCron = {
    items:[],
    interval: null,
    parse: function(strUnix) {
        return strUnix.match(/^(\d+|\*) (\d+|\*) (\d+|\*) (\d+|\*) (\d|\*) +(\w+)/);
    },
    check: function() {
        var hoy = new Date();
        var test = [new Date(), hoy.getMinutes(), hoy.getHours(), hoy.getDate(), hoy.getMonth(), hoy.getDay()];
        for (var i in this.items) {
            var exec = 0;
            var t = this.parse(this.items[i][1]);
            for (var x in t)
                if (t[x] && (t[x] == test[x] || t[x] == "*"))exec++;
            if (exec == 5 && this.items[i][0] == 0) {
                eval(t[6]).call();
                this.items[i][0] = 1;
            } else if (exec <5 && this.items[i][0] == 1) {
                this.items[i][0] = 0;
            }
        }
    },
    set: function(strUnix) {
        if (!/^(\d+|\*) (\d+|\*) (\d+|\*) (\d+|\*) (\d|\*) +(\w+)/.test(strUnix)) return new Error("Formato invalido");
        this.items.push([0, strUnix]);
    },
    init: function(seg) {
        var seg = seg || 1000;
        this.interval = setInterval("jsCron.check()", seg);
    }
};
jsCron.init();