// JavaScript Document
function openMenu(m) {
	
	//Loop looks for any open sub menus and closes all unless a particular sub menu should be active.
	for(var i = 1; i < 7; i++) {
		var str = "sub" + i; //the div id's for each submenu are named sub1, sub2, ... , subx (see leftNav.shtml)
		if((str != m) && (document.getElementById(str) != null)){
			document.getElementById(str).style.visibility = "hidden";
			document.getElementById(str).style.display = "none";
		}
	}
	
	//This will expand the selected sub menu.		
	document.getElementById(m).style.visibility = "visible";
	document.getElementById(m).style.display = "block";
}

function getLoc() {
// Function getLoc parses the URL to determine which sub directory the current page is located in.
// Since each side navigation header points to a different dir, we can determine which side nav sub menus
// need to be loaded.
		
	var url = /(\w+):\/\/([\w.]+)\/(\w+)\/(\w+)\//;
	var text = document.URL;
	var result = text.match(url);
	if (result != null) {
		switch(result[4]) { //result[5] stores 'cancer' in the example "http://www.nebraskamed.com/cancer/.../page.aspx
			case 'cancer':
				openMenu('sub1');
				break;
			case 'heart':
				openMenu('sub2');
				break;
			case 'neuro':
				openMenu('sub3');
				break;
			case 'womens':
				openMenu('sub5');
				break;
			case 'invasive':
				openMenu('sub6');
				break;
			default:
				break;
		}
	}	
}