var ie = document.all ? 1 : 0;
var bw = new checkBrowser();

function checkBrowser() {
   this.ver=navigator.appVersion;
   this.name=navigator.appName;
   this.mac=(navigator.platform.toLowerCase().indexOf('mac')>-1)?true:false;
   this.opera=(navigator.userAgent.toLowerCase().indexOf('opera')>-1)?true:false;
   this.dom=document.getElementById?true:false;
   this.ns=(this.name=='Netscape');
   this.ie4=(document.all && !this.dom)?true:false;
   this.ie=(this.name =='Microsoft Internet Explorer'&&!this.opera)?true:false;
   this.ie5=(this.ie && (navigator.userAgent.indexOf("MSIE 5")!=-1))?true:false;
   this.macie50=(this.mac&&this.ie5&&(navigator.userAgent.indexOf("MSIE 5.0")!=-1))?true:false
   this.ns4=(this.ns && parseInt(this.ver) == 4)?true:false;
   this.ns6=((this.name=="Netscape")&&(parseInt(this.ver)==5))?true:false
   this.standards=document.getElementById?true:false;
   this.dhtml=this.standards||this.ie4||this.ns4;
}

function openwin(loc,w,h) {
   win = window.open(loc,"","width="+w+",height="+h+",noscrollbars,resizable");
}

function openimg(loc) {
   win = window.open("/popup.html?"+loc,"","width=200,height=200,noscrollbars,resizable");
}

function hide(divId) {
   if (document.layers) { document.layers[divId].visibility = 'hide'; }
   else if (bw.ie) { document.all[divId].style.visibility = 'hidden'; }
   else if (bw.standards) { document.getElementById(divId).style.visibility = 'hidden'; }
}

//shows corresponding div
function show(divId) {
   if (document.layers) { document.layers[divId].visibility = 'show'; }
   else if (bw.ie) { document.all[divId].style.visibility = 'visible'; }
   else if (bw.standards) { document.getElementById(divId).style.visibility = 'visible'; }
}