function subWrapperHeight() {
   
	var currHeight = 0;
	var maxHeight = 0;
	pageColumns = new Array('rightColumn', 'centerColumn', 'subWrapper');
	
	for (i = 0; i < pageColumns.length; i++) {
		if (document.getElementById(pageColumns[i])) {
			document.getElementById(pageColumns[i]).style.height = "";
			currHeight = document.getElementById(pageColumns[i]).offsetHeight;
			//alert(currHeight);
			if (currHeight > maxHeight) {
				maxHeight = currHeight;
			}
		}
	}
	
		if (document.getElementById('subWrapper')) {
				document.getElementById('subWrapper').style.height = maxHeight+"px";
			}
			
			//alert('subWrapperHeight!');
		}


// ==========================================================
// getElementsByClassName
// ==========================================================
// define a function to allow us to get elements by className
document.getElementsByClassName = function(cl) {
	var retnode = [];
	var myclass = new RegExp('\\b'+cl+'\\b');
	var elem = this.getElementsByTagName('*');
	for (var i = 0; i < elem.length; i++) {
		var classes = elem[i].className;
		if (myclass.test(classes)) retnode.push(elem[i]);
	}
	return retnode;
};


function hideCrosshairs() {
	document.getElementById('menu').style.background = "none";
}

function showCrosshairs() {
	document.getElementById('menu').style.background = "url('/images/crosshair_horiz.png') 0 91px no-repeat";
}

  	
  	// function for creating a cookie
  	function createCookie(name,value,days) {
		if (days) {
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
	}

	// function for reading a cookie
	function readCookie(name) {
		var nameEQ = name + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++) {
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return null;
	}

	// function for erasing a cookie
	function eraseCookie(name) {
		createCookie(name,"",-1);
	}
  
	function hideFlashIntro() {
	
		var isCookieSet = readCookie('returnVisitor');
		
		if(isCookieSet != 'yes' || isCookieSet == null) {
			
			createCookie('returnVisitor','yes',9999);
		}
		
		//alert(isCookieSet);
	}