Unicode javascript. "zalgo"

zalgo.js

//those go UP
var zalgo_up = [
    '\u030d', /*     Ì     */       '\u030e', /*     ÌŽ     */      '\u0304', /*     Ì„     */      '\u0305', /*     Ì…     */
    '\u033f', /*     Ì¿     */      '\u0311', /*     Ì‘     */      '\u0306', /*     ̆     */      '\u0310', /*     Ì     */
    '\u0352', /*     ͒     */      '\u0357', /*     ͗     */      '\u0351', /*     ͑     */      '\u0307', /*     ̇     */
    '\u0308', /*     ̈     */      '\u030a', /*     ̊     */      '\u0342', /*     ͂     */      '\u0343', /*     ̓     */
    '\u0344', /*     ÌˆÌ     */     '\u034a', /*     ÍŠ     */      '\u034b', /*     Í‹     */      '\u034c', /*     ÍŒ     */
    '\u0303', /*     ̃     */      '\u0302', /*     Ì‚     */      '\u030c', /*     ÌŒ     */      '\u0350', /*     Í     */
    '\u0300', /*     Ì€     */      '\u0301', /*     Ì     */       '\u030b', /*     Ì‹     */      '\u030f', /*     Ì     */
    '\u0312', /*     ̒     */      '\u0313', /*     ̓     */      '\u0314', /*     ̔     */      '\u033d', /*     ̽     */
    '\u0309', /*     ̉     */      '\u0363', /*     ͣ     */      '\u0364', /*     ͤ     */      '\u0365', /*     ͥ     */
    '\u0366', /*     ͦ     */      '\u0367', /*     ͧ     */      '\u0368', /*     ͨ     */      '\u0369', /*     ͩ     */
    '\u036a', /*     ͪ     */      '\u036b', /*     ͫ     */      '\u036c', /*     ͬ     */      '\u036d', /*     ͭ     */
    '\u036e', /*     ͮ     */      '\u036f', /*     ͯ     */      '\u033e', /*     ̾     */      '\u035b', /*     ͛     */
    '\u0346', /*     ͆     */      '\u031a' /*     ̚     */
];

//those go UP
var zalgo_custom = [
    '\u0E47' /*      ็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็็    */
];

//those go DOWN
var zalgo_down = [
    '\u0316', /*     ̖     */      '\u0317', /*     ̗     */      '\u0318', /*     ̘     */      '\u0319', /*     ̙     */
    '\u031c', /*     Ìœ     */      '\u031d', /*     Ì     */       '\u031e', /*     Ìž     */      '\u031f', /*     ÌŸ     */
    '\u0320', /*     Ì      */      '\u0324', /*     ̤     */      '\u0325', /*     Ì¥     */      '\u0326', /*     ̦     */
    '\u0329', /*     ̩     */      '\u032a', /*     ̪     */      '\u032b', /*     ̫     */      '\u032c', /*     ̬     */
    '\u032d', /*     ̭     */      '\u032e', /*     ̮     */      '\u032f', /*     ̯     */      '\u0330', /*     ̰     */
    '\u0331', /*     ̱     */      '\u0332', /*     ̲     */      '\u0333', /*     ̳     */      '\u0339', /*     ̹     */
    '\u033a', /*     ̺     */      '\u033b', /*     ̻     */      '\u033c', /*     ̼     */      '\u0345', /*     ͅ     */
    '\u0347', /*     ͇     */      '\u0348', /*     ͈     */      '\u0349', /*     ͉     */      '\u034d', /*     Í     */
    '\u034e', /*     ÍŽ     */      '\u0353', /*     Í“     */      '\u0354', /*     Í”     */      '\u0355', /*     Í•     */
    '\u0356', /*     ͖     */      '\u0359', /*     ͙     */      '\u035a', /*     ͚     */      '\u0323' /*     ̣     */
];

//those always stay in the middle
var zalgo_mid = [
    '\u0315', /*     Ì•     */      '\u031b', /*     Ì›     */      '\u0340', /*     Ì€     */      '\u0341', /*     Ì     */
    '\u0358', /*     ͘     */      '\u0321', /*     ̡     */      '\u0322', /*     ̢     */      '\u0327', /*     ̧     */
    '\u0328', /*     ̨     */      '\u0334', /*     ̴     */      '\u0335', /*     ̵     */      '\u0336', /*     ̶     */
    '\u034f', /*     Í     */       '\u035c', /*     Íœ     */      '\u035d', /*     Í     */       '\u035e', /*     Íž     */
    '\u035f', /*     ÍŸ     */      '\u0360', /*     Í      */      '\u0362', /*     Í¢     */      '\u0338', /*     ̸     */
    '\u0337', /*     Ì·     */      '\u0361', /*     Í¡     */      '\u0489' /*     Ò‰_     */      
];

// rand funcs
//---------------------------------------------------

//gets an int between 0 and max
function rand(max)
{
    return Math.floor(Math.random() * max);
}

//gets a random char from a zalgo char table
function rand_zalgo(array)
{
    var ind = Math.floor(Math.random() * array.length);
    return array[ind];
}

// utils funcs
//---------------------------------------------------

//hide show element


//lookup char to know if its a zalgo char or not
function is_zalgo_char(c)
{
    var i;
    for(i=0; i<zalgo_up.length; i++)
        if(c == zalgo_up[i])
            return true;
    for(i=0; i<zalgo_down.length; i++)
        if(c == zalgo_down[i])
            return true;
    for(i=0; i<zalgo_mid.length; i++)
        if(c == zalgo_mid[i])
            return true;
    return false;
}



// main shit
//---------------------------------------------------
function zalgo_textarea(id)
{
    var p = document.getElementById(id);

    var txt = p.value;
    var newtxt = '';

    for(var i=0; i<txt.length; i++)
    {
        if(is_zalgo_char(txt.substr(i, 1)))
            continue;

        var num_up;
        var num_mid;
        var num_down;
        var num_custom;

        //add the normal character
        newtxt += txt.substr(i, 1);

        //options
        if(document.getElementById('zalgo_opt_mini').checked)
        {
            num_up = rand(8);
            num_mid = rand(2);
            num_down = rand(8);
            num_custom = rand(8);
        }
        else if(document.getElementById('zalgo_opt_normal').checked)
        {
            num_up = rand(16) / 2 + 1;
            num_mid = rand(6) / 2;
            num_down = rand(16) / 2 + 1;
            num_custom = rand(16) / 2 + 1;
        }
        else if(document.getElementById('zalgo_opt_omg').checked)
        {
            num_up = 50;
            num_mid = 10;
            num_down = 50;
            num_custom = 200;
        }
        else //maxi
        {
            num_up = rand(64) / 4 + 3;
            num_mid = rand(16) / 4 + 1;
            num_down = rand(64) / 4 + 3;
            num_custom = rand(64) / 4 + 3;
        }


        if(document.getElementById('zalgo_opt_up').checked)
            for(var j=0; j<num_up; j++)
                newtxt += rand_zalgo(zalgo_up);
        if(document.getElementById('zalgo_opt_mid').checked)
            for(var j=0; j<num_mid; j++)
                newtxt += rand_zalgo(zalgo_mid);
        if(document.getElementById('zalgo_opt_down').checked)
            for(var j=0; j<num_down; j++)
                newtxt += rand_zalgo(zalgo_down);
        if(document.getElementById('zalgo_opt_custom').checked)
            for(var j=0; j<num_custom; j++)
                newtxt += rand_zalgo(zalgo_custom);
    }

    //result is in nextxt, display that

    //remove all children of zalgo_container
    var container = document.getElementById('zalgo_container');
    while(container.childNodes.length)
        container.removeChild(container.childNodes[0]);

    //build blocks for each line & create a <br />
    var lines = newtxt.split("\n");
    for(var i=0; i<lines.length; i++)
    {
        var n = document.createElement('text');
        n.innerHTML = lines[i];
        container.appendChild(n);
        var nl = document.createElement('br');
        container.appendChild(nl);
    }

    //done
}