function Browser(){
    this.dom = document.getElementById?1:0;
    this.ie4 = (document.all && !this.dom)?1:0;
    this.ie5 = (this.dom && document.all)?1:0;
    this.ie6 = this.ie5;
    this.ie = this.ie5 || this.ie6;
    this.ns4 = (document.layers && !this.dom)?1:0;
    this.ns6 = (this.dom && !document.all)?1:0;
    this.ok = this.dom || this.ie4 || this.ns4;
    this.platform = navigator.platform;
}