// Toggle visibility of a document element
function hideit(id){
	var element = document.getElementById(id);
	element.className="hideit"; 	
}

function togglevis2 (id, showclass, hideclass) {
	var element = document.getElementById(id);
	// Try to get the image for toggling any anchor image associated 
	// Using the convention "<div element name>_img" for the image
	var img_element = document.getElementById(id + "_img")
	var toggle_image = false;
	if (img_element) {
		toggle_image = true;
	}
	if (element.className==showclass) { 
		element.className=hideclass; 
		if (toggle_image) {
			img_element.src="./img/a_expand.gif";
		}
	} 
	else { 
		element.className=showclass; 
		if (toggle_image) {
			img_element.src="./img/a_collapse.gif";
		}
	}
} 
function togglevis (id) {
	togglevis2( id, "showit", "hideit");
} 

function togglerender (div_id, element, page) {
	// Show the div
	togglevis(div_id);
	// Render the page in the iframe inside the div
	frames[element].location.href=page;
}