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function byClass(matchClass){
    if (!document.getElementsByClassName){
        var elements = document.getElementsByTagName('*'),
            i=0,
            nodeList = [],
            reg = new RegExp('(^|\\s)' + matchClass + '(\\s|$)')
       
        for (i=0; i < elements.length;i++)
        {
            if(elements[i].className.match(reg) !== null){

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   // find all points between 2 pooints http://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm     
        var x1 = mouseX,
            x2 = lastX,
            y1 = mouseY,
            y2 = lastY;


        var steep = (Math.abs(y2 - y1) > Math.abs(x2 - x1));
        if (steep){
            var x = x1;

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// For extending the default object with properties
			extend = function(obj, extObj){
				for(var i in extObj){
					if(obj.hasOwnProperty(i)){
						obj[i] = extObj[i];
					}
				}
			}

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for(var i = 0; i < 50; i++){
    var x = Math.random()*width,
        y = Math.random()*height,
        vx = (Math.random()*8)-4,
        vy = (Math.random()*8)-4,
        size = Math.floor(Math.random()*60)+60;
    
    points.push({x:x,y:y,vx:vx,vy:vy, size:size});
                       
};

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var grad = tempCtx.createRadialGradient(point.x, point.y, 1, point.x, point.y, point.size);

tempCtx.beginPath();
grad.addColorStop(0, 'rgba(' + colors.r +',' + colors.g + ',' + colors.b + ',1)');
grad.addColorStop(1, 'rgba(' + colors.r +',' + colors.g + ',' + colors.b + ',0)');
tempCtx.fillStyle = grad;
tempCtx.arc(point.x, point.y, point.size, 0, Math.PI*2);
tempCtx.fill();

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function metabalize(){
    var imageData = tempCtx.getImageData(0,0,width,height),
        pix = imageData.data;
    
    for (var i = 0, n = pix.length; i <n; i += 4) {
        // Checks threshold
        if(pix[i+3]<threshold){
            pix[i+3]=0;
        }
    }

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var canvas = document.getElementById("canvas"),
    ctx = canvas.getContext("2d"),
    tempCanvas = document.createElement("canvas"),
    tempCtx = tempCanvas.getContext("2d"),
    width = 512,
    height = 512,
    threshold = 210,
    colors = {r:255,g:0,b:0}, cycle = 0,
    points = [];

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var sum = function(){
    var arr = [].slice.apply(arguments),
        total = arr.reduce(function(a,b){
            b = parseInt(b);
            if(!isNaN(b)){
                return a+b;
            }else{
                return a;   
            }
        });

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<canvas id="canvas"></canvas>​

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var cards = [];

function initDeck(){
    for(var cardNum = 1; cardNum < 14; cardNum++){
        for(var i = 0; i < 4; i++){
            var suit = i;
            switch(i){
                case 0:
                    suit = "\u2665";
                    break;