function showOfficer(officerNum) {
	document.getElementById("introMessage").style.display="none";
	
	var officerBios = document.getElementsByClassName("officerBio");
	//alert(officerBios.length);
	for (i = 0; i < officerBios.length; i++) 
	{
	officerBios[i].style.display = "none";
	document.getElementById("officer"+officerNum).style.display = "block";
	}
}

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;
};