var currentPaneStyle = 0;
var currentTab = 0;

function tabstrip()
{
   this.tabs = new Array();
   this.add = addTab;
   this.write = writeTabstrip;
}

function tab(caption,content)
{
  this.setId = setId;
  this.caption = caption;
  this.content = content;
  this.write = writeTab;
  this.writeContent = writePane;
}



function addTab(tab)
{
  tab.setId("tab" + this.tabs.length);
  this.tabs[this.tabs.length] = tab;
}

function setId(id)
{
  this.id = id;
}

function initiate()
{
  var div = document.getElementById("tab0");
  showPane(div);
}

function showPane(div)
{
  if(currentTab != 0)
  {
    currentTab.style.backgroundColor = "#999999";
  }
  div.style.backgroundColor = "#ffffff";
  currentTab = div;

  if(currentPaneStyle != 0)
    currentPaneStyle.display = "none";
  var paneId = "pn_" + div.id;
  var objPaneStyle = document.getElementById(paneId).style;
  objPaneStyle.display = "block";
  currentPaneStyle = objPaneStyle;
}

function SubmitForm()
{
   window.alert("Form submitted.  This would normally take you to another page");
   // normally, you would here check the form and submit it.
   // if the form has the name 'tabform', then it is submitted
   // with tabform.submit();
}

function writePane()
{
  document.write("<div class='pane' id='pn_" + this.id + "'>" + this.content + "</div>");
}

function writeTab()
{
   document.write("<td class='tabs' width='80px'><div class='tabs' id='" + this.id + "' onclick='showPane(this)'>" + this.caption + "</div></td>");
}

function writeTabstrip()
{
  document.write("<table class='tabs'><tr>");
  for(var i = 0; i < this.tabs.length; i++)
  {
    this.tabs[i].write();
  }
  document.write("</tr></table>");
  
  for(var k = 0; k < this.tabs.length; k++)
  {
    this.tabs[k].writeContent();
  }
  initiate();
}