var tstwin=0;

function Dialogue( sit , nom )
{
    var yes = 1 ;
    var no = 0 ;
    var menubar = no ;
    var scrollbars = yes ;
    var locationbar = no ;
    var directories = no ;
    if (navigator.userAgent.indexOf('MSIE') != -1){
        var resizable = yes ;
      } else {
        var resizable = no ;
    }
    var statusbar = yes ;
    var toolbar = no ;
    if (navigator.appVersion.substring(0,1) >= 4) {
        var wid2 = (screen.width-11) ;
        var hei2 = (screen.height-80) ;
        var ww = wid2 ;
        if (wid2 > 1020) {var wid2 = 1020 ;}
        if (hei2 > 710) {var hei2 = 710 ;}
        windowprops = "width=" + wid2 + ",height=" + hei2 + ",top=0,left=0" ;
      } else {
        var ww = 620 ;
        windowprops = "width=620,height=400,top=0,left=0" ;
    }
    windowprops += (menubar ? ",menubars" : "") +
    (scrollbars ? ",scrollbars" : "") +
    (locationbar ? ",location" : "") +
    (directories ? ",directories" : "") +
    (resizable ? ",resizable" : "") +
    (statusbar ? ",status" : "") +
    (toolbar ? ",toolbar" : "") ;

//    var lien = arguments[0] + "?largeur=" + ww ;

    if(tstwin)
    {
        if(windia.closed)
        {
            windia = window.open(sit,nom,windowprops) ;
            windia.focus() ;
        }
        else
        {
            windia.focus() ;
        }
    }
    else
    {
        windia = window.open(sit,nom,windowprops) ;
//        tstwin = 1
    }
}