function InitialiseGetData()
{	
	GET_DATA = new Array();

	var getDataString=new String(window.location);
	
	var questionMarkLocation=getDataString.search(/\?/);
	
	if (questionMarkLocation != -1)
	{
		getDataString=getDataString.substr(questionMarkLocation+1);

	        var getDataArray=getDataString.split(/&/g);

	        for (var i=0;i<getDataArray.length;i++)
		{
	        	var nameValuePair=getDataArray[i].split(/=/);

		        GET_DATA[unescape(nameValuePair[0])]=unescape(nameValuePair[1]);
	        }
	}
}


function UpdateMenu()
{
	InitialiseGetData();

	var siteId = GET_DATA['siteId'];

	
	document.menu1.src = 'images/menu1.gif';
	document.menu2.src = 'images/menu2.gif';
	document.menu3.src = 'images/menu3.gif';
	document.menu4.src = 'images/menu4.gif';
	document.menu5.src = 'images/menu5.gif';
	document.menu6.src = 'images/menu6.gif';

	if(siteId == 1)
	{
		document.menu1.src = 'images/menu1_active.gif';
		document.topPicture.src = 'images/pic1.jpg';
	}
	else if(siteId == 2)
	{
		document.menu2.src = 'images/menu2_active.gif';
		document.topPicture.src = 'images/pic2.jpg';
	}
	else if(siteId == 3)
	{
		document.menu3.src = 'images/menu3_active.gif';
		document.topPicture.src = 'images/pic3.jpg';
	}
	else if(siteId == 4)
	{
		document.menu4.src = 'images/menu4_active.gif';
		document.topPicture.src = 'images/pic4.jpg';
	}
	else if(siteId == 5)
	{
		document.menu5.src = 'images/menu5_active.gif';
		document.topPicture.src = 'images/pic5.jpg';
	}
	else if(siteId == 6)
	{
		document.menu6.src = 'images/menu6_active.gif';
		document.topPicture.src = 'images/pic6.jpg';
	}
	else
	{
		document.topPicture.src = 'images/pic1.jpg';
	}
}