function Is() {
 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.ns2 = (this.ns && (this.major == 3));
 this.ns3 = (this.ns && (this.major == 3));
 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) && (agent.indexOf("msie 5.0") == -1));
 this.ie5 = (this.ie && (this.major == 4) && (agent.indexOf("msie 5.0") != -1));
 this.ieX = (this.ie && !this.ie3 && !this.ie4); 
}
var is = new Is();
function unblur() {
 this.blur();
}
function blurLinks() {
 if (!document.getElementById) return;
 theLinks = document.getElementsByTagName("a");
 for(i=0; i<theLinks.length; i++) {
  theLinks[i].onfocus = unblur;
 }
}