var size = 4;
var sdates;
var sgraph;
var button_hover;
var button;

function preloadNewsItems() {
	sdates = new Array(size);
	sdates[0]='1m';
	sdates[1]='1q';
	sdates[2]='1y';
	sdates[3]='5y';

	sgraph = new Array(size);

	button_hover = new Array(size);

	button = new Array(size);
	if (document.images) {
		var i=0;
		for (i=0;i<size;i++)
		{
			sgraph[i] = new Image(200, 100);
			sgraph[i].src = 'http://www.oil-price.net/'+sdates[i]+'_small.gif';
			button_hover[i] = new Image(25, 20);
			button_hover[i].src = 'http://www.oil-price.net/TABLE2/hover_'+sdates[i]+'.png';
			button[i] = new Image(25, 20);			
			button[i].src = 'http://www.oil-price.net/TABLE2/button_'+sdates[i]+'.png';
		}
	}
}
function showGraph2(id)
{
	var which
	which = document.getElementById('graphID');
	which.src=sgraph[id].src;
	buttonName='button_'+id;

	which = document.getElementById(buttonName);
	which.src=button_hover[id].src;
	var i=0;
	for (i=0; i<size; i++)
	{
		if (id==i)
		  continue;
		buttonName='button_'+i;
		which = document.getElementById(buttonName);
		which.src=button[i].src;
	}
}