function OpenPopup(theUrl, winName, myWidth, myHeight, myFeatures) {
	
	// set features of popup
	var features = 'width='+myWidth+',height='+myHeight;
    if (myFeatures) {
    	features+=','+myFeatures;
    }
    
    // open popup
	var theWindow = window.open(theUrl,winName,features);
	
	// link current window to popup
	theWindow.opener = window;
	
	// link popup to current window
	window.popup = theWindow;
	
}