function hidediv(obj) {
	var el = document.getElementById(obj);
		el.style.display = "none"; 	
}

function showdiv(obj) {
	var el = document.getElementById(obj);
		el.style.display = "block"; 	
}

function addperson(obj,obj2) {
	var el = document.getElementById(obj);
	var el2 = document.getElementById(obj2);
	el.style.display = "block";
	el2.style.display = "none";
}

function openNewWindow(URLtoOpen, windowName, windowFeatures) {
newWindow=window.open(URLtoOpen, windowName, windowFeatures); }


//nav
var citiesarray=new Array('navi_chinasub','navi_vietnamsub');

function opennav(id){	
	hideallcities();
	showcity(id);
}

function hideallcities(){
	//loop through the array and hide each element by id
	for (var i=0;i<citiesarray.length;i++){
		hidecity(citiesarray[i]);
	}		  
}

function hidecity(id) {
	//safe function to hide an element with a specified id
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'none';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'none';
		}
		else { // IE 4
			document.all.id.style.display = 'none';
		}
	}
}

function showcity(id) {
	//safe function to show an element with a specified id
		  
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'block';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'block';
		}
		else { // IE 4
			document.all.id.style.display = 'block';
		}
	}
}