/********************************************************
**	shortcut getElementById
*********************************************************/
function $(id) {
  return document.getElementById(id);
}

/********************************************************
**	getElementsByClassName function
*********************************************************/
document.getElementsByClassName = function (needle) {
  var my_array = document.getElementsByTagName("*");
  var retvalue = new Array();
  var i;
  var j;

  for (i = 0, j = 0; i < my_array.length; i++) {
    var c = " " + my_array[i].className + " ";
    if (c.indexOf(" " + needle + " ") != -1)
      retvalue[j++] = my_array[i];
  }
  return retvalue;
}

/********************************************************
**	addEvent handler
**	obj = object to attach event to
**	evType = Event type (load, unload, click, etc.)
**	fn = function
*********************************************************/
function addEvent(obj, evType, fn) {
	if (obj.addEventListener) {
		obj.addEventListener(evType, fn, true);
		return true;
	} else if (obj.attachEvent) {
		var r = obj.attachEvent("on"+evType, fn);
		return r;
	} else {
		return false;
	}
}

/********************************************************
**	removeEvent handler
**	obj = object to attach event to
**	evType = Event type (load, unload, click, etc.)
**	fn = function
*********************************************************/
function removeEvent(obj, evType, fn) {
	if (obj.removeEventListener) {
		obj.removeEventListener(evType, fn, false);
		return true;
	} else if (obj.detachEvent) {
		var r = obj.detachEvent("on"+evType, fn);
		return r;
	} else {
		return false;
	}
}
/********************************************************
**	img rollover

*********************************************************/

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  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=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

/********************************************************
**	image replace

*********************************************************/


function changeblue()
{
number = Math.floor(Math.random()*3)
if (number==0)
document.write('<img src="images/banner-strapline.gif" width="659" height="45" align="top" border="0">')
if (number==1)
document.write('<img src="images/banner-strapline2.gif" width="659" height="45" align="top" border="0">')
if (number==2)
document.write('<img src="images/banner-strapline3.gif" width="659" height="45" align="top" border="0">')
}

function changegreen()
{
number = Math.floor(Math.random()*3)
if (number==0)
document.write('<img src="images/banner-strapline_green1.gif" width="659" height="45" align="top" border="0">')
if (number==1)
document.write('<img src="images/banner-strapline_green2.gif" width="659" height="45" align="top" border="0">')
if (number==2)
document.write('<img src="images/banner-strapline_green3.gif" width="659" height="45" align="top" border="0">')
}

function changepurple()
{
number = Math.floor(Math.random()*3)
if (number==0)
document.write('<img src="images/banner-strapline_purple1.gif" width="659" height="45" align="top" border="0">')
if (number==1)
document.write('<img src="images/banner-strapline_purple2.gif" width="659" height="45" align="top" border="0">')
if (number==2)
document.write('<img src="images/banner-strapline_purple3.gif" width="659" height="45" align="top" border="0">')
}

function changered()
{
number = Math.floor(Math.random()*3)
if (number==0)
document.write('<img src="images/banner-strapline_red1.gif" width="659" height="45" align="top" border="0">')
if (number==1)
document.write('<img src="images/banner-strapline_red2.gif" width="659" height="45" align="top" border="0">')
if (number==2)
document.write('<img src="images/banner-strapline_red3.gif" width="659" height="45" align="top" border="0">')
}

function changeyellow()
{
number = Math.floor(Math.random()*3)
if (number==0)
document.write('<img src="images/banner-strapline_yellow1.gif" width="659" height="45" align="top" border="0">')
if (number==1)
document.write('<img src="images/banner-strapline_yellow2.gif" width="659" height="45" align="top" border="0">')
if (number==2)
document.write('<img src="images/banner-strapline_yellow3.gif" width="659" height="45" align="top" border="0">')
}

function changelexi()
{
number = Math.floor(Math.random()*6)
if (number==0)
document.write('<img src="images/lexicopia_small_1.png" width="205" height="182" align="top" border="0">')
if (number==1)
document.write('<img src="images/lexicopia_small_2.png" width="205" height="182" align="top" border="0">')
if (number==2)
document.write('<img src="images/lexicopia_small_3.png" width="205" height="182" align="top" border="0">')
if (number==3)
document.write('<img src="images/lexicopia_small_4.png" width="205" height="182" align="top" border="0">')
if (number==4)
document.write('<img src="images/lexicopia_small_5.png" width="205" height="182" align="top" border="0">')
if (number==5)
document.write('<img src="images/lexicopia_small_6.png" width="205" height="182" align="top" border="0">')
}