Check if all images on page are loaded using JavaScript

verifyIfImagesAreLoaded.js

//WARNING! May not work with some SVG images
//For some SVGs the naturalWidth/naturalHeight attributes will equal 0
//even if image is properly loaded

var allLoaded=true;
var images = document.images;
// or: var images = document.getElementsByTagName('img');
for (i=0; (i<images.length) && allLoaded; i++) {
   result = images[i].complete && (typeof images[i].naturalWidth!="undefined" && images[i].naturalWidth>0);  
   allLoaded=allLoaded && result;
}