// JavaScript Document
function randomImg(){
	//young child array
	var arrYoungChildImg = new Array();
	arrYoungChildImg[0] = 'images/youngchild1.jpg';
	arrYoungChildImg[1] = 'images/youngchild2.jpg';
	arrYoungChildImg[2] = 'images/youngchild3.jpg';
	arrYoungChildImg[3] = 'images/youngchild4.jpg';
	arrYoungChildImg[4] = 'images/youngchild5.jpg';
	arrYoungChildImg[5] = 'images/youngchild6.jpg';
	arrYoungChildImg[6] = 'images/youngchild7.jpg';
	arrYoungChildImg[7] = 'images/youngchild8.jpg';	
	
	//old child array
	var arrOldChildImg = new Array();
	arrOldChildImg[0] = 'images/child1.jpg';
	arrOldChildImg[1] = 'images/child2.jpg';
	arrOldChildImg[2] = 'images/child3.jpg';
	arrOldChildImg[3] = 'images/child4.jpg';
	arrOldChildImg[4] = 'images/child5.jpg';
	arrOldChildImg[5] = 'images/child6.jpg';
	arrOldChildImg[6] = 'images/child7.jpg';
	arrOldChildImg[7] = 'images/child8.jpg';
	arrOldChildImg[8] = 'images/child9.jpg';
	arrOldChildImg[9] = 'images/child10.jpg';
	
	//teen array
	var arrTeenImg = new Array();
	arrTeenImg[0] = 'images/teen1.jpg';
	arrTeenImg[1] = 'images/teen2.jpg';
	arrTeenImg[2] = 'images/teen3.jpg';
	arrTeenImg[3] = 'images/teen4.jpg';
	arrTeenImg[4] = 'images/teen5.jpg';
	arrTeenImg[5] = 'images/teen6.jpg';
	arrTeenImg[6] = 'images/teen7.jpg';
	arrTeenImg[7] = 'images/teen8.jpg';
	arrTeenImg[8] = 'images/teen9.jpg';
	arrTeenImg[9] = 'images/teen10.jpg';
	
	//adult array
	var arrAdultImg = new Array();
	arrAdultImg[0] = 'images/adult1.jpg';
	arrAdultImg[1] = 'images/adult2.jpg';
	arrAdultImg[2] = 'images/adult3.jpg';
	arrAdultImg[3] = 'images/adult4.jpg';
	arrAdultImg[4] = 'images/adult5.jpg';
	arrAdultImg[5] = 'images/adult6.jpg';
	arrAdultImg[6] = 'images/adult7.jpg';
	arrAdultImg[7] = 'images/adult8.jpg';
	arrAdultImg[8] = 'images/adult9.jpg';
	arrAdultImg[9] = 'images/adult10.jpg';
	arrAdultImg[10] = 'images/adult11.jpg';
	arrAdultImg[11] = 'images/adult12.jpg';
	arrAdultImg[12] = 'images/adult13.jpg';
	arrAdultImg[13] = 'images/adult14.jpg';
	arrAdultImg[14] = 'images/adult15.jpg';
	arrAdultImg[15] = 'images/adult16.jpg';
	arrAdultImg[16] = 'images/adult17.jpg';
	arrAdultImg[17] = 'images/adult18.jpg';
	arrAdultImg[18] = 'images/adult19.jpg';
	arrAdultImg[19] = 'images/adult20.jpg';
	arrAdultImg[20] = 'images/adult21.jpg';
	arrAdultImg[21] = 'images/adult22.jpg';
	arrAdultImg[22] = 'images/adult23.jpg';
	
	//random number for each image section
	var youngChildRandNum = Math.floor(Math.random() * arrYoungChildImg.length);
	var oldChildRandNum = Math.floor(Math.random() * arrOldChildImg.length);
	var teenRandNum = Math.floor(Math.random() * arrTeenImg.length);
	var adultRandNum = Math.floor(Math.random() * arrAdultImg.length);
	
	//change source of all images
	document.getElementById("youngChildImg").src = arrYoungChildImg[youngChildRandNum];
	document.getElementById("oldChildImg").src = arrOldChildImg[oldChildRandNum];
	document.getElementById("teenImg").src = arrTeenImg[teenRandNum];
	document.getElementById("adultImg").src = arrAdultImg[adultRandNum];
	
}