function imgSwap(str)
{
	// Kolla om det är IE5.5-6
	var ver = parseFloat(navigator.appVersion.split("MSIE")[1]);
	var obj;
	
	if( ver < 7 )
		obj = document.getElementById('span_'+str).filters(0);
	else
		obj = document.getElementById('img_'+str);

	if( obj.src.indexOf('_off') != -1 )
		obj.src = obj.src.replace('_off','_on');
	else
		obj.src = obj.src.replace('_on','_off');
}

function preloadImages()
{
	if( document.images )
	{
		var i = 0;
		var oImg = new Image();
		
		var images = new Array();
		images[0] = 'images/menu_start_on.jpg';
		images[1] = 'images/menu_about_on.jpg';
		images[2] = 'images/menu_contact_on.jpg';
		images[3] = 'images/menu_email_on.jpg';
		
		for(i = 0; i <= 3; i++)
			oImg.src = images[i];
	}	
}

function hideSidebar()
{
	var E = window, a = 'inner';

	if ( !( 'innerWidth' in window ) )
	{
	a = 'client';
	E = document.documentElement || document.body;
	}

	if( E[ a+'Width' ] < 1160 )
	{
		if( E[ a+'Width'] <= 800 )
		{
			/* Antag res 800*600, göm sidebar helt, TODO: minska höjden så menyn syns. */
			document.getElementById('sidebar').style.display = 'none';
		}
		else
		{
			/* TODO: Mindre än 1160 i bredd, byt pivotpunkt i horizontallinjen */
			document.getElementById('sidebar').style.display = 'none';
		}
	}
	else
	{
		/* Mer än 1160 i bredd */
		document.getElementById('sidebar').style.display = 'block';
	}
}