credit: heygirl.io

heygirl.js

function Gosling(ratio,imageurl){this.ratio=ratio;this.imageurl=imageurl}var getGosling={init:function(myGosling){this.myGosling=myGosling},horizontal:function(){return this.myGosling.filter(function(myGosling){return myGosling.ratio==="horizontal"})},vertical:function(){return this.myGosling.filter(function(myGosling){return myGosling.ratio==="vertical"})},square:function(){return this.myGosling.filter(function(myGosling){return myGosling.ratio==="square"})}};function Randomize(images){return Math.floor(Math.random()*images.length)}var myGosling=[new Gosling("horizontal","http://heygirl.io/img/gosling-horiz-1.png"),new Gosling("horizontal","http://heygirl.io/img/gosling-horiz-2.gif"),new Gosling("horizontal","http://heygirl.io/img/gosling-horiz-3.jpg"),new Gosling("vertical","http://heygirl.io/img/gosling-vert-1.jpg"),new Gosling("vertical","http://heygirl.io/img/gosling-vert-3.jpg"),new Gosling("vertical","http://heygirl.io/img/gosling-vert-4.jpg"),new Gosling("vertical","http://heygirl.io/img/gosling-vert-5.gif"),new Gosling("vertical","http://heygirl.io/img/gosling-vert-6.jpg"),new Gosling("vertical","http://Jheygirl.io/img/gosling-vert-7.jpg"),new Gosling("vertical","http://heygirl.io/img/gosling-vert-8.jpg"),new Gosling("vertical","http://heygirl.io/img/gosling-vert-9.jpg"),new Gosling("square","http://heygirl.io/img/gosling-square-1.jpg"),new Gosling("square","http://heygirl.io/img/gosling-square-2.jpg"),new Gosling("square","http://heygirl.io/img/gosling-square-3.jpg")];function imageRatio(image){var proportion=image.height/image.width;if(proportion>1)return"vertical";else if(proportion===1)return"square";else if(proportion<1)return"horizontal"}(function(document){getGosling.init(myGosling);var images=document.getElementsByTagName("img"),length=images.length;for(var i=0;i<length;i++){var ratio=imageRatio(images[i]);if(ratio==="horizontal"){var number=Randomize(getGosling.horizontal());var img=getGosling.horizontal()[number];images[i].src=img.imageurl}else if(ratio==="square"){var number=Randomize(getGosling.square());var img=getGosling.square()[number];images[i].src=img.imageurl}else if(ratio==="vertical"){var number=Randomize(getGosling.vertical());var img=getGosling.vertical()[number];images[i].src=img.imageurl}}})(document);