function menu_over( row )
{
	img = document.getElementById( "menu_image" + row );
	if( img )
	{
		img.hspace = "14";
		img.src = "/images/menu_blokje.gif";
	}
	
}

function menu_out( row )
{
	if( row == activeMenuItem ) return false;
	img = document.getElementById( "menu_image" + row );
	img.src = "/images/spacer.gif";
}

//prefix for onmouseover images
var hoversuffix = "_ov";
		
function imagehover( obj, overout )
{
	src = obj.src;
	
	//for toggle check whether obj is hoverd or not
	if( overout == 0 || !overout )
	{
		//hoversuffix not found, then hover item else unhover item
		if( src.indexOf( hoversuffix ) == -1 )
			overout = 1;
		else
			overout = -1;
	}
	
	//unhover
	if( overout < 0 )
	{
		obj.src = src.replace( hoversuffix, "" );
	}
	
	//hover
	else if ( overout > 0 )
	{
		src = src.replace( hoversuffix, "" );
		ext = src.substring( src.lastIndexOf("."), src.length );
		obj.src = src.replace( ext, hoversuffix + ext );
	}
}

//preload function for just one image
function preloadImage( src )
{
	//create imageobject
	tmpImage = new Image( );
	//set preloadprocess handler
	//load image
	tmpImage.src = src;
}