// add an extra action once this page is completely loaded
function addOnLoadFunc (newfunc) { var oldLoad = window.onload;
 window.onload = function () { if (oldLoad) { oldLoad(); } newfunc(); } }


// for putting a default into search inputs and then clearing it as needed
var changedSearch = {}; function clearSearch (e) { var n = e.form.name+e.name;
 if (!changedSearch[n]) { e.value = ''; changedSearch[n] = true; } return true; }




// track what major features we have access to (equiv to browser testing)
var ie4 = (document.all ? true : false);
var ns4 = (document.layers ? true : false);
var w3c = (document.getElementById ? true : false);

// shortcut function to get object using appropriate browser feature
function getByID (id)
{
	if (w3c) { return document.getElementById(id); }
	else if (ie4) { return document.all[id]; }
	else if (ns4) { return document.layers[id]; }
	return null;
}





// basic image rollover functions -- onmouseover="imgOn('imgName')"
function imgOn (name) { document[name].src = '/pictures/'+name+'2.gif'; }
function imgOff (name) { document[name].src = '/pictures/'+name+'.gif'; }

// rollover for input type="image" -- onmouseover="imgOn(this)"
function imgOn2 (elem) { elem.src = elem.src.replace(/(\.[^\.]+)$/,'2$1'); }
function imgOff2 (elem) { elem.src = elem.src.replace(/(2\.[^\.]+)$/,'$1'); }

// this is a SAMPLE of how to preload the images:
// precaching of rollover images
//a = new Image(); a.src = '/pictures/name2.gif';






// checks to see if we have actually left a menu for onMouseOut
//  got inspiration from:
// http://www.quirksmode.org/js/events_mouse.html#mouseover
//  e == the event from onMouseOut="isInMenu(event,this)" or this => "getByID('base_id')"
//  b == the base element, are we really moving out of this?
function isInMenu (e,b)
{
	// adapt to NS/IE naming differences
	if (!e) { e = window.event; }
	var p = (e.relatedTarget ? e.relatedTarget : e.toElement);

	// check all parents, see if they are the base element
	while (p)
	{
		// one of the parents is the base element, we're still over it
		if (p == b) { return true; }

		// this parent is not the base, keep checking the next parent up
		p = p.parentNode;
	}

	// we never found the base in all parents of event's target
	//  ergo, we really are no longer over the base element
	return false;
}







// used for adding css :hover attribute to any element in IE
//  adapted from:  http://www.htmldog.com/articles/suckerfish/dropdowns/
function IEHover (id, tag)
{
	var elem = document.getElementById(id); if (elem) {
	var els = elem.getElementsByTagName(tag); for (var i in els) {
		els[i].onmouseover = function () { this.className += " iehover"; };
		els[i].onmouseout = function () { this.className = this.className.replace(new RegExp(" iehover\\b"), ""); }
}}}

// add iehover class only in IE, but for any number of id+tag pairs
function onloadIEHover (r) { if (window.attachEvent) { for (var i in r)
 { window.attachEvent("onload", function () { IEHover(r[i][0],r[i][1]) }); } } }

// ex: onloadIEHover([['dropdown_menu','LI'],]);