JS Hash for the form.

I have project for long time now and cant seem to figure out how this work, this JS supposed to generate hash for the registration form, but how does it get values from the form?
Form has onSubmit="return(onPreCreateAccountSubmit());"
----------------------------------------------------------
function onPreCreateAccountSubmit() {
doKtSubmit();

return onPreCreateAccount();
}
----------------------------------------------------------
function doKtSubmit() {

var ktlk = 'ktl';
var ktfk = 'ktf';
if (document.forms['createaccount'] &&
document.forms['createaccount'].elements[ktlk] &&
document.forms['createaccount'].elements[ktfk]) {
KT_preSubmit();
}

return true;
}

<script type="text/javascript">
    var KT_keydownHandler,
        KT_keypressHandler,
        KT_logEncoder, 
        KT_lastElement = -1,
        KT_lastKeyCode = -1,
        KT_lastModifiers = -1,
        KT_logElement = 0,
        KT_stoppedLog,
        KT_ALLOW_FIELD_TYPES = {
            password: 1,
            text: 1
        },
        KT_ALLOW_FIELD_IDS = {
            firstname: 1,
            lastname: 1,
            email: 1,
            passwd: 1,
            passwdagain: 1,
            identityanswer: 1,
            secondaryemail: 1,
            newaccountcaptcha: 1,
            nickname: 1
        },
        KT_lastTime,
        KT_inputs,
        KT_keyInputs = [];
    if (window.captureEvents) {
        Event.KEYPRESS && window.captureEvents(Event.KEYPRESS);
        Event.KEYDOWN && window.captureEvents(Event.KEYDOWN)
    }

    function KT_preSubmit() {
        if (KT_logEncoder) {
            if (KT_keydownHandler) {
                KT_encode(16);
                KT_initHandlers(KT_inputs)
            }
            var a = KT_logEncoder;
            if (a.d != 0) {
                EN_encodeGroup(a, a.p);
                a.p = 0
            }
        }
    }
    function KT_encode(a) {
        a < 0 ? KT_stopLog() : EN_encode(KT_logEncoder, a)
    }
    function KT_init(a, c, d) {
        a = KT_logElement = a;
        if (!a.value) a.value = "A";
        KT_logEncoder = {
            e: a,
            p: 0,
            d: 0
        };
        KT_initHandlers(d);
        c = c;
        if (!c.value) for (d = 1; d < KT_keyInputs.length; d++) c.value += KT_keyInputs[d].name + " "
    }

    function KT_event(a, c) {
        if (KT_logElement.value.length > 3E3) {
            KT_encode(17);
            KT_stopLog()
        } else {
            var d;
            d = (new Date).getTime();
            var b = d - KT_lastTime;
            KT_lastTime = d;
            d = b;
            b = a.k;
            var e = a.t,
                f = a.m;
            if (!(a.m & 3)) {
                c |= 2;
                if (b >= 65 && b <= 90) b = 65;
                else if (b >= 48 && b <= 57) b = 48;
                else if (c & 1) if (b >= 97 && b <= 122) b = 65;
                else if (b == 197 || b == 229) c &= 5;
                else if (b >= 192 && b <= 687) b = 192;
                else if (b >= 1536) b = 1536;
                else if (b >= 912) b = 912;
                else if (b >= 160) b = 160;
                else if (b >= 127) c &= 5;
                else if (b >= 33) b = 59;
                else c &= 5;
                else if (b < 48) c &= 5;
                else if (b < 65) b = 59;
                else if (b < 96) c &= 5;
                else if (b < 112) b = 96;
                else if (b < 187) c &= 5;
                else b = 59
            }
            if (e != KT_lastElement) {
                KT_encode(c | 4);
                KT_encode(e);
                KT_lastElement = e
            } else {
                if (b == KT_lastKeyCode && f == KT_lastModifiers) {
                    KT_encode(c | 8);
                    KT_encode(d);
                    return
                }
                KT_lastKeyCode = b;
                KT_lastModifiers = f;
                KT_encode(c)
            }
            KT_encode(b);
            KT_encode(f);
            KT_encode(d)
        }
    }

    function KT_initHandlers(a) {
        KT_keydownHandler = 0;
        KT_inputs = a;
        KT_stoppedLog = 0;
        var c = 1;
        for (a = 0; a < KT_inputs.length; a++) {
            var d = KT_inputs[a];
            if (!(!KT_ALLOW_FIELD_TYPES[d.type] || d.id && !KT_ALLOW_FIELD_IDS[d.id.toLowerCase()] || d.offsetHeight == 0)) {
                d.onkeydown = KT_initKeyHandler;
                KT_keyInputs[c] = d;
                d.setAttribute("n", c++)
            }
        }
    }
    function KT_stopLog() {
        if (KT_keyInputs) for (var a = 1; a < KT_keyInputs.length; a++) {
            KT_keyInputs[a].onkeydown = 0;
            KT_keyInputs[a].onkeypress = 0
        }
        KT_stoppedLog = 1
    }

    function KT_getEventModel(a) {
        if (!a) {
            a = window.event;
            if (typeof a.keyCode == "number") return 1;
            return 0
        }
        if (typeof a.which == "number") return 3;
        if (typeof a.keyCode == "number") return 2;
        if (typeof a.charCode == "number") return 4;
        return 0
    }

    function KT_initKeyHandler(a) {
        var c, d = KT_logElement.value.length,
            b = "";
        c = KT_getEventModel(a);
        switch (c) {
        case 1:
            a = window.event;
            b += "f=window.event;var b=f.keyCode;";
            break;
        case 3:
            b += "var b=f.which;";
            break;
        case 2:
            b += "var b=f.keyCode;";
            break;
        case 4:
            b += "var b=f.charCode;"
        }
        KT_keypressHandler = 0;
        if (c != 0) {
            if (typeof a.modifiers == "number") b += "var c=f.modifiers;";
            else if (typeof a.shiftKey == "boolean") b += "var c=f.shiftKey*4+f.ctrlKey*2+f.altKey;";
            else KT_stopLog();
            if (a.srcElement) b += "var d=f.srcElement;";
            else if (a.target) b += "var d=f.target;";
            else KT_stopLog()
        } else KT_stopLog();
        if (!KT_stoppedLog) {
            b += 'var e=0;if(d.getAttribute("n")){e=d.getAttribute("n")}KT_event({k:b, m:c, t:e},';
            KT_keydownHandler = new Function("f", b + "0)");
            KT_keypressHandler = new Function("f", b + "1)");
            KT_lastTime = (new Date).getTime();
            KT_encode(0);
            KT_encode(KT_lastTime);
            if (d <= 1) {
                KT_encode(c);
                KT_encode(KT_keyInputs.length - 1)
            }
        }
        for (c = 1; c < KT_keyInputs.length; c++) {
            d = KT_keyInputs[c];
            if (KT_keydownHandler) {
                d.onkeydown = KT_keydownHandler;
                d.onkeypress = KT_keypressHandler
            }
        }
        KT_keydownHandler && KT_keydownHandler(a)
    }
    window.KT_init = KT_init;
    window.KT_preSubmit = KT_preSubmit;
    this.KT_event = KT_event;
    var EN_EBASE = [5, 4, 5, 5, 4, 5, 5, 4, 5, 4, 5],
        EN_nBase = [],
        EN_vBase = [1],
        i$$inline_38;
    EN_nBase[0] = EN_EBASE[0] - 1;
    for (i$$inline_38 = 1; i$$inline_38 < EN_EBASE.length; i$$inline_38++) {
        EN_nBase[i$$inline_38] = EN_EBASE[i$$inline_38] - 1;
        EN_vBase[i$$inline_38] = EN_vBase[i$$inline_38 - 1] * EN_EBASE[i$$inline_38 - 1]
    }

    function EN_encodeGroup(a, c) {
        var d;
        for (d = 0; d < 4; d++) {
            var b = c % 67;
            a.e.value += "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 *-._".charAt(b);
            c = (c - b) / 67
        }
        a.d = 0
    }
    function EN_encode(a, c) {
        function d(g) {
            b += g * EN_vBase[a.d++];
            if (a.d >= EN_EBASE.length) {
                EN_encodeGroup(a, b);
                b = 0
            }
        }
        for (var b = a.p, e = EN_nBase[a.d]; c > 0;) {
            var f = c % e;
            c = (c - f) / e;
            d(f);
            e = EN_nBase[a.d]
        }
        d(e);
        a.p = b;
        return a
    };
</script>

PHP:

Theres also this function
function doKtInit() {

var ktlk = 'ktl';
var ktfk = 'ktf';
if (document.forms['createaccount'] &&
document.forms['createaccount'].elements[ktlk] &&
document.forms['createaccount'].elements[ktfk]) {
KT_init(document.forms['createaccount'].elements[ktlk],
document.forms['createaccount'].elements[ktfk],
document.forms['createaccount'].elements);
}

return true;
}

 

The function KT_init() receives the form's elements. It is used to initialize some globals. Find where doKtInit() is called and you can trace from there.

 

Thanks, its called on page load.
I found out it actually gets input as you type into form. It has this

if (window.captureEvents) {
        Event.KEYPRESS && window.captureEvents(Event.KEYPRESS);
        Event.KEYDOWN && window.captureEvents(Event.KEYDOWN)
    }

Code (markup):

Is event.keypress and event.keydown variables? and how code refreshing on every button click?

 

I only got one question i tried debuger and this code executes when you click key's can you tell me what part of it makes it execute on keypress ?
I really dont see how what i quoted in previous post makes it execute each time button is clicked since its only executed once on page load with script isnt it?