initToggle = function () {
	var table = document.getElementsByTagName("table");
		for (var i=0; i<table.length; i++) {
			var caption = table[i].getElementsByTagName("caption"); {
				caption[0].tbody = table[i].getElementsByTagName("tbody");
				caption[0].tbody[0].style.display = 'none';
				caption[0].style.backgroundImage = 'url(/assets/arrowDown.gif)';
				caption[0].onclick = function () {
					this.tbody[0].style.display = this.tbody[0].style.display == '' ? 'none' : '';
					this.style.backgroundImage = this.style.backgroundImage == 'url(/assets/arrowDown.gif)' ? 'url(/assets/arrowUp.gif)' : 'url(/assets/arrowDown.gif)';				
				}
			}
		}	
}

function setVars() { 
	var captions = new Object();
	captions.items = document.getElementsByTagName('caption');
	captions.length = captions.items.length;
}

window.onload = function() {
	setVars();
	initToggle();
}