function preloadImages() { 
  var d=document; if(d.images){ if(!d.p) d.p=new Array();
    var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}

function findObj(n, d) { 
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document); return x;
}

function changeImages(){
  var isOkBrowser;
  isOkBrowser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3)) ||((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)))
  if (isOkBrowser){
    if (changeImages.arguments.length = 2){
      document[changeImages.arguments[0]].src = changeImages.arguments[1];
    }
  }
}

function DisplayImages(){
  var isOkBrowser;
  isOkBrowser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3)) ||((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)))
  if (isOkBrowser){
    if (DisplayImages.arguments.length = 3){
      document[DisplayImages.arguments[0]].src = DisplayImages.arguments[1];
      document[DisplayImages.arguments[0]].style.display = "inline";
      document[DisplayImages.arguments[0]].style.position = "absolute";
      document[DisplayImages.arguments[0]].style.top = DisplayImages.arguments[2];
      document[DisplayImages.arguments[0]].style.left = "1px";

    }
  }
}

function HideImages(){
  var isOkBrowser;
  isOkBrowser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3)) ||((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)))
  if (isOkBrowser){
    if (HideImages.arguments.length = 1){      
      document[HideImages.arguments[0]].style.display = "none";
    }
  }
}

function calculateTotal(inputItem) {
  with (inputItem.form) {    
    if (inputItem.type == "radio") {   // Process radio buttons.
      // Subtract the prev rb value from the total.
      // Save the current radio selection value.
      // Add the current radio button selection value to the total.
      calculatedTotal.value = eval(calculatedTotal.value) - eval(previouslySelectedRadioButton.value);
      previouslySelectedRadioButton.value = eval(inputItem.value);
      calculatedTotal.value = eval(calculatedTotal.value) + eval(inputItem.value);

    } 
    else {   
      if (inputItem.checked == false) {   // Item was uncheck. Subtract item value from total.
          calculatedTotal.value = eval(calculatedTotal.value) - eval(inputItem.value);
      } else {   // Item was checked. Add the item value to the total.
          calculatedTotal.value = eval(calculatedTotal.value) + eval(inputItem.value);
      }
    }

    // Total value should never be less than 0.
    if (calculatedTotal.value < 0) {
      InitForm();
    }

    // Return total value.    
    return(formatCurrency(calculatedTotal.value));
  }
}

// Format a value as currency.
function formatCurrency(num) {
  num = num.toString().replace(/\$|\,/g,'');
  if(isNaN(num))
     num = "0";
  sign = (num == (num = Math.abs(num)));
  num = Math.floor(num*100+0.50000000001);
  cents = num%100;
  num = Math.floor(num/100).toString();
  if(cents<10)
      cents = "0" + cents;
  for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
      num = num.substring(0,num.length-(4*i+3)) + ',' + num.substring(num.length-(4*i+3));
  return (((sign)?'':'-') + '$' + num + '.' + cents);
}

// This function initialzes all the form elements to default values.
function InitForm() {
  // Reset values on form.
  document.all.total.innerHTML = formatCurrency(document.EccForm.initialTotal.value);
  document.EccForm.calculatedTotal.value=document.EccForm.initialTotal.value;
  document.EccForm.previouslySelectedRadioButton.value=0;

  // Set all checkboxes and radio buttons on form to unchecked.
  for (i=0; i < document.EccForm.elements.length; i++) {
    if (document.EccForm.elements[i].type == 'checkbox' | document.EccForm.elements[i].type == 'radio') {
      document.EccForm.elements[i].checked = false;
    }
  }
}