function popup(page)
       {
		   nom=navigator.appName;
		   var Left=window.screen.width/2-512;
		   var Top=window.screen.height/2-326;
		   DimEcran = screen.width;
	
		if(DimEcran <= 800){
		   if (nom=="Microsoft Internet Explorer")
		   {
		   var Configuration="' menubar=no, toolbar=no, location=no, directories=no, resizeable=no, scrollbars=yes, width=1024, height=673, left=" + Left + ",top=" + Top;
		   }else{
	
		   var Configuration="' menubar=no, toolbar=no, location=no, directories=no, resizeable=no, width=1024,scrollbars=yes , height=673, left=" + Left + ",top=" + Top;
		   }
		}else{
				   if (nom=="Microsoft Internet Explorer")
		   {
		   var Configuration="' menubar=no, toolbar=no, location=no, directories=no, resizeable=no, scrollbars=no, width=1024, height=673, left=" + Left + ",top=" + Top;
		   }else{
	
		   var Configuration="' menubar=no, toolbar=no, location=no, directories=no, resizeable=no, width=1024,scrollbars=no , height=673, left=" + Left + ",top=" + Top;
		   }
		}
		   window.open(page,'',Configuration);
	   }