function initsectionbuttons()
{
	preloadButtons('button_practice', 'button_people', 'button_projects', 'button_news', 'button_contact');
}

var arButtonImages=new Array();

function preloadButtons() {
	var temp = preloadButtons.arguments; 
	for(i=0; i < temp.length; i++)
	{
		name=preloadButtons.arguments[i];
		name_selected = name + '_selected';
		filename = 'images/' + name + '.gif';
		filename_selected = 'images/' +  name + '_selected.gif';
		arButtonImages[name] = new Image();
		arButtonImages[name_selected] = new Image();
		arButtonImages[name].src=filename;
		arButtonImages[name_selected].src=filename_selected;
		//alert(name_selected + ' source is ' + arImages[name_selected].src);
 	}
}

function overButton(what)
{
	document[what].src=arButtonImages[what + '_selected'].src;
}

function outButton(what)
{
	document[what].src=arButtonImages[what].src;
}