// JavaScript Document
window.onload = initAll;

var currImg = 0;
var paintingSrc = new Array("01.jpg","02.jpg","22.jpg","24.jpg","25.jpg","77.jpg");
var captionText = new Array("The Bridge of Sighs, St John’s College","Norman Church of the Holy Sepulchre","King’s College Chapel and the Entrance Court, from the Fellows’ Buildings","King’s College Chapel Interior from the Choir","The Hall of King’s College","Madingley Windmill");

function initAll() {
	document.getElementById("button1").onclick = lastPic;
	document.getElementById("button2").onclick = nextPic;
	{
	newPic();
	}
}

function newPic() {
	document.getElementById("painting").src = "paintings/" + paintingSrc[currImg];
	document.getElementById("title").innerHTML = captionText[currImg];
		
}	

function nextPic() {
	currImg++;
	if (currImg == paintingSrc.length) {
		currImg = 0;
	}
	newPic();
}
function lastPic() {
	
	if (currImg == 0 ) {
		currImg = paintingSrc.length;
	}
	currImg--;
	newPic();
}