/* This js sets up hover states for the images and input's with class="button" when the page loads */
var buttonHover = {
	init: function() {
		var inputsAndImages = getElementsByClass('button');
		for(i=0; i<inputsAndImages.length; i++) {
			button = inputsAndImages[i];
			if (button.nodeName == 'INPUT' || button.nodeName == 'IMG') {
				// input or image -> good to go
				addEvent(button, 'mouseover', buttonHover.overFn);
				addEvent(button, 'mouseout', buttonHover.outFn);
			}
		}
	},
	// Add '_over' to filename xxxxxx_over.xxx
	overFn: function() {
		this.src = this.src.replace('.gif', '_over.gif');
	},
	// Remove '_over' from filename xxxxxx.xxx
	outFn: function() {
		this.src = this.src.replace('_over.gif', '.gif');
	}
};
addEvent(window, 'load', buttonHover.init);
  
// Returns array of elements with class
function getElementsByClass(theClass) {
	var elementArray = [];
	if (document.all) {
		elementArray = document.all;
	}
	else {
		elementArray = document.getElementsByTagName("*");
	}
	var matchedArray = [];
	var pattern = new RegExp("(^| )" + theClass + "( |$)");
	for (var i = 0; i < elementArray.length; i++) {
		if (pattern.test(elementArray[i].className)) {
			matchedArray[matchedArray.length] = elementArray[i];
		}
	}
	return matchedArray;
}
	
/* Cross-browser event listeners */
function addEvent( obj, type, fn ) {
	if ( obj.attachEvent ) {
		obj['e'+type+fn] = fn;
		obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
		obj.attachEvent( 'on'+type, obj[type+fn] );
	}
	else {
		obj.addEventListener( type, fn, false );
	}
}

function launchWindow(sURL, lWidth, lHeight) {
	var lWinLeft = (screen.width - lWidth) / 2;
	var lWinTop = (screen.height - lHeight) / 2;
	oPopUpWindow = window.open(sURL, 'apply', ('width=' + lWidth + ',height=' + lHeight + ',resizable=yes,scrollbars=yes,menubar=no,status=yes,top=' + lWinTop + ',left=' + lWinLeft));
	setTimeout('oPopUpWindow.focus();',250);
}