function ME_Cbrowser() {
  // verificação genérica
  var b=navigator.appName;
  if (b=="Netscape") this.b="ns"
  else if (b=="Microsoft Internet Explorer") this.b="ie"
  else this.b=b
  this.version=navigator.appVersion
  this.v=parseInt(this.version)
  this.ns=(this.b=="ns" && this.v>=4)
  this.ns4=(this.b=="ns" && this.v==4)
  this.ns5=(this.b=="ns" && this.v==5)
  this.ie=(this.b=="ie" && this.v>=4)
  this.ie4=(this.version.indexOf('MSIE 4')>0)
  this.ie5=(this.version.indexOf('MSIE 5')>0)
  this.ie6=(this.version.indexOf('MSIE 6')>0)
  this.dom=((document.createRange&&(document.createRange().createContextualFragment))?true:false)
 }