(function($){  
	$(document).ready(function() {
		var imgPath = '/Portals/0/Uploads/Images/quiz_images/';
		var imgNames = ['01','02','03','04','05','06','07','08','09','10','11','12','13','14','15','16','17','18','19','20'];
		var shuffledArray = shuffle(imgNames);
		
		//alert(shuffledArray + ": " +shuffledArray[1]);
		$('#jq_quiz img').each(function(i) {
			if (i < shuffledArray.length) {
				$(this).attr('src', imgPath + shuffledArray[i++] + '.jpg');
			}
		});
		
		//shuffles an Array
		function shuffle(sArray) {
			var i, temp, arrayLength= sArray.length, newArray= sArray.concat();
			while(--arrayLength){
				i= Math.floor(Math.random()*arrayLength);
				temp= newArray[i];
				newArray[i]= newArray[arrayLength];
				newArray[arrayLength]= temp;
			}
			return newArray;
		}
	});  
})(jQuery);