ns=window.navigator.appName == "Netscape"
ie=window.navigator.appName == "Microsoft Internet Explorer"

function setvars () {
 mainitems = 7
 aboutitems = 4
 talesitems = 5
 funitems = 1
 sponsorsitems = 1
 welcomeitems = 1
}

function closeallcontent () {
 setvars();
 for (i=1; i<=mainitems; i++) {
  document.all.content[i].style.visibility = "hidden"
 }
 for (i=1; i<=talesitems; i++) {
  document.all.talescontent[i].style.visibility = "hidden"
 }
 for (i=1; i<=funitems; i++) {
  document.all.funcontent[i].style.visibility = "hidden"
 }
 for (i=1; i<=aboutitems; i++) {
  document.all.aboutcontent[i].style.visibility = "hidden"
 }
 for (i=1; i<=sponsorsitems; i++) {
  document.all.sponsorscontent[i].style.visibility = "hidden"
 }
 for (i=1; i<=welcomeitems; i++) {
  document.all.welcomecontent[i].style.visibility = "hidden"
 }
}

function openmain(x) {
 var mainitems = 7
 closeallcontent();
 for (i=1; i<=mainitems; i++) {
  if(ns) {
   alert ("You are using a Netscape browser. Unfortunately this site has been optimised for use with Internet Explorer and will not display correctly in Netscape and some other browsers. Please return to our page using a different browser. Please e-mail comments to skipper@sailtales.co.uk")
  }
  if(ie) {
   if (x == 1) {
    document.all.welcomecontent[x].style.visibility = "visible"
    document.all.box[i].style.visibility = "hidden"
   } else {
    document.all.box[i].style.visibility = "hidden"
    document.all.box[x].style.visibility = "visible"
    document.all.content[i].style.visibility = "hidden"
    document.all.content[x].style.visibility = "visible"
   }
  }
 }
}

function openabout(x) {
 closeallcontent();
 document.all.aboutcontent[x].style.visibility = "visible"
}

function opentales(x) {
 closeallcontent();
 document.all.talescontent[x].style.visibility = "visible"
}

function opensponsors(x) {
 closeallcontent();
 document.all.sponsorscontent[x].style.visibility = "visible"
}

function stCome() {
 setvars();
 var doit = 0
 for (i=1; i<=mainitems; i++) {
  if(document.all.content[i].style.visibility == "visible") {
   var doit = 1
  }
 }
 if (doit == 0) {
  document.all.content[1].style.visibility = "visible"
 }
}