var old_zindex, old_font_size, old_color;
function highlight_word( id )
{
	div = document.getElementById( id );
	old_zindex = div.style.zIndex;
	old_font_size = div.style.fontSize;
	old_color = div.style.color;
	div.style.border = "1px solid #000";
	div.style.background = "url(../img/yellow_background.gif)";
	div.style.zIndex = 100;
	div.style.fontSize = "20px";
}

function dehighlight_word( id )
{
	div = document.getElementById( id );
	div.style.border="none";
	div.style.background = "";
	div.style.zIndex = old_zindex;
	div.style.fontSize = old_font_size;
	div.style.color = old_color;
}