function Picker(url, width, height) {

   this.url    = url;

   this.width  = width ? width : 800;

   this.height = height ? height : 600;

   this.form   = '';

   this.input  = '';



   this.open = function(f, fe) {
     this.form  = f;
     this.input = fe;
     remote = window.open(this.url,'Picker','width='+this.width+',height='+this.height+',scrollbars');
     if (remote.opener == null) {
       remote.opener = window;
     }
     remote.opener.name   = 'MainWindow';
     remote.opener.picker = this;
     remote.moveTo((screen.width-this.width)/2, (screen.height-this.height)/2);
   }


   this.send = function(val) {
     obj = eval('document.'+this.form+'.'+this.input);
     obj.value = val;
     remote.close();
   }
 }