function addonload(func) {
	if (typeof window.addEventListener != 'undefined') {
		window.addEventListener('load', func, false);
	} else if (typeof window.attachEvent != "undefined") { // IE
		window.attachEvent('onload', func );
	} else {
		if (window.onload != null) {
			// maintain any other onload events
			var oldOnload = window.onload;
			window.onload = function (e) {
				oldOnload(e);
				func();
			};
		} else {
			window.onload = func;
		}
	}
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (loaded == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			if (document[changeImages.arguments[i]]) {
				document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
			} else {
				changeImages.arguments[i].src = changeImages.arguments[i+1];
			}
		}
	}
}
function changeArrow() {
	if (document.images && (loaded == true)) {
		for (var i=0; i<changeArrow.arguments.length; i+=2) {
			if (document[changeArrow.arguments[i]]) {
				if (document[changeArrow.arguments[i]].src.indexOf('/images/right_arrow.gif') > 0) {
					document[changeArrow.arguments[i]].src = '/images/down_arrow.gif';
				} else {
					document[changeArrow.arguments[i]].src = '/images/right_arrow.gif';
				}
			} else {
				if (changeArrow.arguments[i].src.indexOf('/images/right_arrow.gif') > 0) {
					changeArrow.arguments[i].src = '/images/down_arrow.gif';
				} else {
					changeArrow.arguments[i].src = '/images/right_arrow.gif';
				}
			}
		}
	}
}
var loaded;
function preloadImages() {
	for (var i=0;i<preloadImages.arguments.length;i++) {
		newImage(preloadImages.arguments[i]);
	}
	loaded = true;
}

function popImage(img, alt) {
	url = '/imageviewer.php?pic='+img+'&alt='+alt;
	window.open(url, 'ImageZoom', 'width=435,height=495');
}

function externalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") &&
		anchor.getAttribute("rel") == "blank")
		anchor.target = "_blank";
	}
}
addonload(externalLinks);

function toggleDiv(divName) {
	thisDiv = document.getElementById(divName);
	if (thisDiv) {
		if (thisDiv.offsetHeight > 0 || thisDiv.style.display == "block") {
			thisDiv.style.display = "none";
		}
		else {
			thisDiv.style.display = "block";
		}
	}
}

function toggleClass(divName) {
	thisDiv = document.getElementById(divName);
	if (thisDiv) {
		if (thisDiv.className == '') {
			thisDiv.className = "currentbio";
		}
		else {
			thisDiv.className = "";
		}
	}
}


// this function is needed to work around a bug in IE related to element attributes
function hasClass(obj) {
	var result = false;
	if (obj.getAttributeNode("class") != null) {
		result = obj.getAttributeNode("class").value;
	}
	return result;
}

function stripe(id) {
	// the flag we'll use to keep track of whether the current row is odd or even
	var even = false;

	// if arguments are provided to specify the colours of the even & odd rows, then
	// use the them; otherwise use the following defaults:
	var evenColor = arguments[1] ? arguments[1] : "#fff";
	var oddColor = arguments[2] ? arguments[2] : "#eee";

	// obtain a reference to the desired table, if no such table exists, abort
	var table = document.getElementById(id);
	if (!table) { return; }

	// by definition, tables can have more than one tbody element, so we'll have to
	// get the list of child &lt;tbody&gt;s
	var tbodies = table.getElementsByTagName("tbody");

	// and iterate through them...
	for (var h = 0; h < tbodies.length; h++) {

		// find all the &lt;tr&gt; elements...
		var trs = tbodies[h].getElementsByTagName("tr");

		// ... and iterate through them
		for (var i = 0; i < trs.length; i++) {

			// avoid rows that have a class attribute or backgroundColor style
			if (!hasClass(trs[i]) && !trs[i].style.backgroundColor) {

				// get all the cells in this row...
				var tds = trs[i].getElementsByTagName("td");

				// and iterate through them...
				for (var j = 0; j < tds.length; j++) {
					var mytd = tds[j];

					// avoid cells that have a class attribute or backgroundColor style
					if (!hasClass(mytd) && !mytd.style.backgroundColor) {
						mytd.style.backgroundColor = even ? evenColor : oddColor;
					}
				}
			}
			// flip from odd to even, or vice-versa
			even = !even;
		}
	}
}