function div_toggle(div_id) {

	var the_toggle = document.getElementById(div_id);
	
	if (the_toggle.style.display == 'none') {
		the_toggle.style.display = 'block'; }
	else {the_toggle.style.display = 'none'; }


}

// this is used to build a filter for the listing
function build_filter(field){
	var terms;
	var base;
	base = "/taxonomy/term/";
	
	for (i = 0; i < field.length; i++)
		if (field[i].checked ==  true) {
			//alert(field[i].value);
			if (terms == undefined) {terms = field[i].value;}
			else {terms += ","; 
					terms += field[i].value;
					}
		}
	//alert(terms);
	
	//alert(base+terms);
	
	// 
	
	
	//alert(location.href);
	//window.location=base+terms;
	//alert(window.location);
	//window.navigate(base+terms);
	
	if (terms != undefined) {
		/// window.location.href=base+terms;
		document.getElementById('nav_filter').action = base+terms;
		document.nav_filter.submit
	} else { alert ('Please select some options!'); }
}