function OpenPopup(sURL, sWindowName, iWidth,iHeight, sScrollYesNo, sResizableYesNo){
	var fLeftPosition, fTopPosition;
	var sSettings;	
	
	fLeftPosition = (screen.width) ? (screen.width-iWidth)/2 : 0;
	fTopPosition = (screen.height) ? (screen.height-iHeight)/2 : 0;
	
	sSettings = 'height='+ iHeight +',width='+ iWidth +',top='+ fTopPosition +',left='+ fLeftPosition +',scrollbars='+ sScrollYesNo +',resizable=' + sResizableYesNo
	window.open(sURL, sWindowName, sSettings)
}