function largeimg(id,k,last){
			obj=document.getElementById('p'+id);
			prevp=document.getElementById('prev');
			nextp=document.getElementById('next');
			id=id.substr(1);
			key=id.substr(0,3);
			if (id.indexOf('http')!=-1)
			{
				document.getElementById('max300').innerHTML='<img src="'+id +'" alt="" width="223" height="196">';
			}
			else
			document.getElementById('max300').innerHTML='<img src="http://www.ukbooker.co.uk/images/bigpics/'+id+'.jpg" alt="" width="223" height="196">';
			n=Number(k);
			document.getElementById('max300').name=n;
			if (n>0) prevp.style.visibility="visible";
			else prevp.style.visibility="hidden";
			if ((n+1)==last) nextp.style.visibility="hidden";
			else nextp.style.visibility="visible";
	} 
	function prevhide(){
		obj=document.getElementById('prev');
		if (obj!=null)
		obj.style.visibility="hidden";	
	}
	function nextpic(max){
		key=Number(document.getElementById('max300').name);
		nextp=document.getElementById('next');
		prevp=document.getElementById('prev');
		if ((key+2)==max) nextp.style.visibility="hidden";
		prevp.style.visibility="visible";
		x=key+1;
		id=String(pic[x]);
		key=id.substr(0,3);
		document.getElementById('max300').innerHTML='<img src="http://www.ukbooker.co.uk/images/bigpics/'+id+'.jpg" alt="" width="223" height="196">';
		document.getElementById('max300').name=x;
	}

	function prevpic() {
		key=Number(document.getElementById('max300').name);
		nextp=document.getElementById('next');
		prevp=document.getElementById('prev');
		if (key==1) prevp.style.visibility="hidden";
		nextp.style.visibility="visible";
		x=key-1;
		id=String(pic[x]);
		key=id.substr(0,3);
		document.getElementById('max300').innerHTML='<img src="http://www.ukbooker.co.uk/images/bigpics/'+id+'.jpg" alt="" width="223" height="196">';
		document.getElementById('max300').name=x;
	
	}