function set_element_class_name ( element_name, class_name )
{
	var o_element = document.getElementById ( element_name );
	
	if ( o_element == null ) return;
	
	o_element.className = class_name;
}

function get_element_inner_html ( element_name )
{
	var o_element = document.getElementById( element_name );
	
	if ( o_element == null ) return "";
	
	return o_element.innerHTML;
}

function set_element_inner_html ( element_name, element_value )
{
	var o_element = document.getElementById( element_name );
	
	if ( o_element == null ) return;
	
	o_element.innerHTML = element_value;
}