var searchQuery = '';
var selectedTab = 'google';

function searchTabClicked(tab)
{
   var searchFrame = document.getElementById('searchResultFrame'); 
   selectedTab = tab;
   
   var googleTab = document.getElementById('googleTab');
   var yahooTab = document.getElementById('yahooTab');
   var liveTab = document.getElementById('liveTab');
   var askTab = document.getElementById('askTab');
   
   var googleFrame = document.getElementById('googleFrame');
   var yahooFrame = document.getElementById('yahooFrame');
   var liveFrame = document.getElementById('liveFrame');
   var askFrame = document.getElementById('askFrame');
   
   googleFrame.style.display = 'none';
   yahooFrame.style.display = 'none';
   liveFrame.style.display = 'none';
   askFrame.style.display = 'none';
   
   document.getElementById(tab + 'Frame').style.display = '';
  
   googleTab.style.background = 'url("google_tab.gif")';
   yahooTab.style.background = 'url("yahoo_tab.gif")';
   liveTab.style.background = 'url("live_tab.gif")';
   askTab.style.background = 'url("ask_tab.gif")';
   
   document.getElementById(tab + 'Tab').style.background = 'url("' + tab + '_tab_high.gif")';
}

function searchButtonClicked()
{
   var textBox = document.getElementById('searchText');
   if(textBox.value == '')
      return;
      
   searchQuery = textBox.value;
      
   performSearch();
}

function keyPressed(e)
{
   if(e.keyCode == 13 || e.keyCode == 3)
      searchButtonClicked();
}

function performSearch()
{
   var googleFrame = document.getElementById('googleFrame');
   var yahooFrame = document.getElementById('yahooFrame');
   var liveFrame = document.getElementById('liveFrame');
   var askFrame = document.getElementById('askFrame');
   
   googleFrame.src = 'http://www.google.com/search?hl=en&q=' + escape(searchQuery);
   yahooFrame.src = 'http://search.yahoo.com/search?p=' + escape(searchQuery);
   liveFrame.src = 'http://search.live.com/results.aspx?q=' + escape(searchQuery);
   askFrame.src = 'http://www.ask.com/web?q=' + escape(searchQuery);
}