function browserCheck() {
  var is = new Is();

  if((is.ns && is.major<5) || is.ie3 || (is.ie4 && !document.getElementById)) {
    document.location = "browsererror.php";
  }
}

function Is() {
  var agent  = navigator.userAgent.toLowerCase();
  this.major = parseInt(navigator.appVersion);
  this.minor = parseFloat(navigator.appVersion);
  this.ns    = ((agent.indexOf('mozilla')     != -1) &&
		 (agent.indexOf('spoofer')    == -1) &&
		 (agent.indexOf('compatible') == -1) &&
		 (agent.indexOf('opera')      == -1) &&
		 (agent.indexOf('webtv')      == -1));
  this.ns4   = (this.ns && (this.major        ==  4));
  this.ns6   = (this.ns && (this.major        >=  5));
  this.ie    = (agent.indexOf("msie")         != -1);
  this.ie3   = (this.ie && (this.major        <   4));
  this.ie4   = (this.ie && (this.major >= 4));
  this.ie5   = (this.ie && (this.major ==  4) &&
		(agent.indexOf("msie 5.0") != -1));
  this.ieX   = (this.ie && !this.ie3 && !this.ie4);
  this.mac   = (agent.indexOf("mac") != -1);
}

function chanImg() {
  if (document.images) {
    for (var i=0; i<chanImg.arguments.length; i+=2) {
      document[chanImg.arguments[i]].src = chanImg.arguments[i+1];
    }
  }
}