function blockEvent(e)
{
	var newE = getEvent(e);
	if (newE != null)
	{
		newE.returnValue = false;
		newE.cancelBubble = true;
		if (window.event == null)
		{
			newE.preventDefault();
			newE.stopPropagation();
		}
	}
}


// function getEvent - returns event based on browser

function getEvent(e)
{
	var newE;
	if (e != null) //Netscape 4 or W3C DOM event model
		if (e.eventPhase != null) 
		{	
			//W3C DOM event model
		    emod = "W3C";
			newE = e;
		}
		else 
		{
			//NN4+ event model
		    emod = "NN4";
			newE = e;
		}
	else if (window.event != null) 
	{
		//MSIE 4+ event model
	    emod = "IE4+";
		newE = window.event;
	}
	else 
	{
		emod = "unknown"; // no event object found
		newE = null;
	}

    //alert("Page loaded! Your event model is: "+emod);
	return newE;
}



// Determine browser and version.

function Browser() {

  var ua, s, i;

  this.isIE    = false;
  this.isNS    = false;
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}

function changeHeader(header)
{
	headerElem = document.getElementById("header");
	if (headerElem)
	{
		if (header=="")
			header = 0;
		headerElem.style.backgroundImage = "url('/style2/images/header"+ header +".jpg')";
	}
}