function div_control(div_name, visible) {
	// Standards-compliant browsers.
	if (document.getElementById) {
		var div_style = document.getElementById(div_name);
	// Old IE versions.
	} else if (document.all) {
		var div_style = document.all[div_name];
	// Netscape 4.
	} else if (document.layers) {
		var div_style = document.layers[div_name];
	// This browser can't handle layers.
	} else {
	    return;
	}
	div_style.style.display = (visible == false ? "none" : "");
}


function expand_search(div_name) {
	div_control(div_name, true);
	div_control(div_name + '_collapse_1', true);
	div_control(div_name + '_collapse_2', true);
	div_control(div_name + '_collapse_3', true);
	div_control(div_name + '_expand', false);
}


function collapse_search(div_name) {
	div_control(div_name, false);
	div_control(div_name + '_collapse_1', false);
	div_control(div_name + '_collapse_2', false);
	div_control(div_name + '_collapse_3', false);
	div_control(div_name + '_expand', true);
}