function show_hide_div(div_id,visibility_var) {
	// Shows or hides layer, on/off toggle styleee
	var temp_div;
	
	temp_div = eval(div_id);
		
	if(typeof(eval(div_id)) != 'undefined') {
		if(!(eval(visibility_var))) {
			temp_div.style.display = '';
			eval(visibility_var+"=true");
		} else {
			temp_div.style.display = 'none';
			eval(visibility_var+"=false");
		}
	}
}