pup=null;

function openPopup( url, w, h ) {

	var prop=""
	+"left=50,screenX=50"
	+",top=50,screenY=50"
	+",width="+w
	+",height="+h
	+",directories=0"
	+",location=0"
	+",menubar=0"
	+",resizable=0"
	+",scrollbars=0"
	+",status=0"
	+",toolbar=0"
	;

	var pup = window.open( url, "", prop );
	
	pup.focus( );

}