function wst()
		{
			window.status="OPTRAL" ;
			window.setTimeout("wst()",1);
		}

			
		
		function obrirfinestra(URL_finestra, Opcions, Ample, Altura)
		{

		    PosX = (screen.availWidth - Ample)/2;
		    PosY = (screen.availHeight - Altura)/2;
			
	            if (Opcions == '')
			 {   Opcions = 'width=' + Ample;}
		    else
		    	 {   Opcions += ',width=' + Ample;}

			Opcions += ',height=' + Altura + ',left=' + PosX + ',top=' + PosY;

	             window.open(URL_finestra, "", Opcions);
		  }

		
		

		wst();