function toggleUnequalWidths(){
  // if ((navigator.appName == "Microsoft Internet Explorer") && (navigator.appVersion == "4.0 (compatible; MSIE 5.0; Macintosh; I; PPC)")){
    // alert ("Entering toggleUnequalWidths()<BR>");
  // }
  if (document.getElementById("Equal width yes").checked == true){
    blank('Left curtain width');
    blank('Right curtain width');
    hide('unequalwidths');
  } else {
    show('unequalwidths');
  }
  toggleHeavyCurtains();
  toggleCordSide();
  updatePrices();
}

function toggleCordSide() {
  // if ((navigator.appName == "Microsoft Internet Explorer") && (navigator.appVersion == "4.0 (compatible; MSIE 5.0; Macintosh; I; PPC)")){
    // alert ("Entering toggleCordSide()<BR>");
  // }
  if ((numCurtains == 1) || ((numReverseEnds < 1) && (document.getElementById("Heavy curtains no").checked == true) && (numCurtains == 2) && (document.getElementById("Equal width yes").checked == true))){
    show('cordside');
    if (numCurtains == 2) {
      show('cordsideboth');
    } else {
      blank('Cord side both');
      hide('cordsideboth');
    }
  } else {
    blank('Cord side left');
    blank('Cord side right');
    blank('Cord side both');
    hide('cordside');
  }
}

function toggleHeavyCurtains() {
  // if ((navigator.appName == "Microsoft Internet Explorer") && (navigator.appVersion == "4.0 (compatible; MSIE 5.0; Macintosh; I; PPC)")){
    // alert ("Entering toggleHeavyCurtains()<BR>");
  // }
  if (numReverseEnds < 1 && numCurtains == 2 && document.getElementById("Equal width yes").checked == true) {
    show('heavycurtains');
  } else {
    blank('Heavy curtains yes');
    blank('Heavy curtains no');
    hide('heavycurtains');
  }
}

function toggleRecommendBoth(){
  // if ((navigator.appName == "Microsoft Internet Explorer") && (navigator.appVersion == "4.0 (compatible; MSIE 5.0; Macintosh; I; PPC)")){
    // alert ("Entering toggleRecommendBoth()<BR>");
  // }
  if (275 <= getTotalLength() && 1 < numCurtains && document.getElementById("Cord side both").checked == false){
    show('recommendboth');
  } else {
    hide('recommendboth');
  }
}

function toggleCurtainLayers(){
  // if ((navigator.appName == "Microsoft Internet Explorer") && (navigator.appVersion == "4.0 (compatible; MSIE 5.0; Macintosh; I; PPC)")){
    // alert ("Entering toggleCurtainLayers()<BR>");
  // }
  if (numCurtains == 1) {
    blank('Left curtain width');
    blank('Right curtain width');
    blank('Equal width yes');
    blank('Equal width no');
    hide('unequalwidths');
    hide('twoormorecurtains');
    show('onecurtain');
  } else {
    blank('Single curtain left');
    blank('Single curtain right');
    hide('onecurtain');
    show('twoormorecurtains');
  }
  if (numCurtains == 3){
    show('threecurtains')
  } else {  
    hide('threecurtains');
  }
  if (numCurtains == 4){
    show('fourcurtains');
  } else {  
    hide('fourcurtains');
  }
  if (blnCorded){
    numOverlapArmsOld = numOverlapArms;
    numOverlapArms = numCurtains - 2;
    if (numOverlapArms < 0){
      numOverlapArms = 0;
    }
    if (numOverlapArms != numOverlapArmsOld) {
      document.getElementById("numberofoverlaparms").innerHTML = numOverlapArms;     
    }
  }
  toggleHeavyCurtains();
  toggleCordSide();
  reflectChanges();
}