var version = parseFloat(navigator.appVersion); 
var agent = navigator.userAgent.toLowerCase();
var opera = (agent.indexOf('opera') != -1) ? true : false;
var ie = ((document.all) && (version >= 4.0)&&(!opera)) ? true : false;
var nn4 = document.layers ? true : false;
var dom = (document.getElementById && !document.all) ? true : false; 


function popUp(url, name, options){
	
	var popUpName = 'splash';
	var popUpOptions = 'top=0,left=0,width=500,height=600,location=no,menubar=no,scrollbars=1';
	
	popupPos = getBrowserPos();
	
	if(name != null){
		popUpName = name;
	}
	
	if(options != null){
		popUpOptions = options;
	}
	
	popup = window.open(url, popUpName, popUpOptions);
}


function getBrowserPos(){
	
	posX = 0;
	posY = 0;
	
	if(ie || opera){
		if (typeof(window.screenLeft) == 'undefined'){
			posX = posY = 0; 
		}
		else{
			posX = window.screenLeft;
			posY = window.screenTop;
		} 
	}
	else if(dom || nn4){
		if (typeof(window.screenX) == 'undefined'){
			posX = posY = 0; 
		}
		else{
			posX = window.screenX;
			posY = window.screenY;
		}
	}
	else{
		posX = posY = 0;
	}	
	
	return [posX, posY];
}