function pop_jsform_field (){
        var u_date = new Date()
        var currentTimeZoneOffsetInHours = u_date.getTimezoneOffset()/60
        var mimetypes_arr= Array();
        var plugins_arr=  Array();
        for (var x=0;x<navigator.mimeTypes.length;x++){
                mimetypes_arr.push(navigator.mimeTypes[x].type)
        }
        for (var x=0;x<navigator.plugins.length;x++){
            plugins_arr.push(navigator.plugins[x].name)
        }
        var width = screen.width
        var height = screen.height
      var JS_brow_arr = new Array (width,height,currentTimeZoneOffsetInHours,navigator.appCodeName,navigator.appMinorVersion,navigator.cpuClass,mimetypes_arr.join(","),plugins_arr.join(","),navigator.systemLanguage,navigator.userAgent,navigator.userLanguage,u_date);
//        this.value=JS_brow_arr;
        return (JS_brow_arr.join("|"));
}