//les options de la fenetre



var PrefaceWindowOptions = "toolbar=no,location=no,directories=no,status=no" 


	+ ",menubar=no,scrollbars=yes,resizable=yes" 


	+ ",width=520,height=500";


	var PrefaceWindow;


function OpenPrefaceWindow(theFile) {


	if ((PrefaceWindow == null) || (PrefaceWindow.closed)){ 


		PrefaceWindow = this.open(theFile, "PrefaceWindow", PrefaceWindowOptions);


	} 


	PrefaceWindow.location.replace(theFile);


	PrefaceWindow.focus();


}