function newwinn(fich)
{
  var numargs = arguments.length;
  if (numargs < 2) {
     var a= Math.random() *100000;
     window.open(fich,"w" + Math.round(a),"width=600,height=500,scrollbars=yes,resizable=yes,top=20,left=20");
  } else {
       var w= arguments[1];
       var h= arguments[2];
       window.open(fich,"w" + Math.round(a),"width=" + w + ",height=" + h + ",resizable=no,top=20,left=20");      
    }
}

function newwins(fich)
{ 
      var a= Math.random() *100000;
      var w= arguments[1];
       var h= arguments[2];
       window.open(fich,"w" + Math.round(a),"width=" + w + ",height=" + h + ",scrollbars=yes,resizable=no,top=20,left=20");      
 }