// JavaScript Document
// general scripts
//
// Center #main in the browser
function getHeight() {
	if (parseInt(navigator.appVersion)>3) {
 		if (navigator.appName=="Netscape") {
  			winW = window.innerWidth;
  			winH = window.innerHeight;
 		}
 		if (navigator.appName.indexOf("Microsoft")!=-1) {
  			/*
  			winW = document.body.offsetWidth;
  			winH = document.body.offsetHeight;
  			*/
  			winH = document.documentElement.clientHeight;
  		}
	}
	center(winH);
}
	
function center(browserHeight) {
	main = document.getElementById('main');
	var minHeight = 750; //min-Height declared in CSS file
	if (browserHeight > minHeight) {
		bCenter = (browserHeight/2)-(minHeight/2);
		main.style.top = bCenter + 'px';
	} else {
		main.style.top = 0 + 'px';
	}
}
//
//
// resize columns
function findTallestColumn() {
	var leftcol   = document.getElementById('gnav');
	var rightcol   = document.getElementById('content');
	//
	if (rightcol.offsetHeight > leftcol.offsetHeight) {
		var tallestColumn = rightcol.offsetHeight;
	} else {
		var tallestColumn = leftcol.offsetHeight;
	}
	//
	resizeHandouts(tallestColumn);
}
//
function resizeHandouts(newHeight){
	document.getElementById('gnav').style.height = newHeight + 'px';
	document.getElementById('content').style.height = newHeight + 'px';
}