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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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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 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;

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<div id="hitarea">
    <div id="a-1" class="hitbox"></div>
    <div id="a-2" class="hitbox"></div>
    <div id="a-3" class="hitbox"></div>
    <div id="a-4" class="hitbox"></div>
    <div id="a-5" class="hitbox"></div>
    <div id="b-1" class="hitbox"></div>
    <div id="b-2" class="hitbox"></div>
    <div id="b-3" class="hitbox"></div>
    <div id="b-4" class="hitbox"></div>

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<canvas id="canvas"></canvas>

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<canvas id="canvas"></canvas>

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function getOffsetRect(elem) {
    var box = elem.getBoundingClientRect(),
        body = document.body,
        docElem = document.documentElement,
        scrollTop = window.pageYOffset || docElem.scrollTop || body.scrollTop,
        scrollLeft = window.pageXOffset || docElem.scrollLeft || body.scrollLeft,
        clientTop = docElem.clientTop || body.clientTop || 0,
        clientLeft = docElem.clientLeft || body.clientLeft || 0,
        top = box.top + scrollTop - clientTop,
        left = box.left + scrollLeft - clientLeft,

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function post(url, data, callback){
	var ajaxRequest = new XMLHttpRequest();
	
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4 || ajaxRequest.readyState == 200){
			callback(ajaxRequest.responseText);
		}
	}
	ajaxRequest.open("POST", url);
	ajaxRequest.setRequestHeader("Content-Type", "application/json;charset=UTF-8");