/*

*/


// function from http://www.dustindiaz.com/top-ten-javascript/
function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	}
	else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

// gets an element, an switches from overflow: hidden to overflow: visible
function switchVisibility(id) {
	element = document.getElementById(id);
	image = document.getElementById('image_'+id);
	if(element.style.overlow == 'visible') {
		element.style.overlow = 'hidden';
		element.style.height='';
		image.src='/htdocs/pic/'+id+'-arrow-down.jpg';
	}
	else {	
		element.style.overlow = 'visible';
		element.style.height='100%';
		image.src='/htdocs/pic/'+id+'-arrow-up.jpg';
	}
}