// methods to show/hide "AJAX" form divs. assumes you have _form, _busy, and _link divs
function show_busy_div(name) {
	if($(name+'_form')) { Element.hide(name+'_form'); };
	if($(name+'_link')) { Element.hide(name+'_link'); };
	if($(name+'_busy')) { Element.show(name+'_busy'); };
}
function show_form_div(name) {
	if($(name+'_link')) { Element.hide(name+'_link'); };
	if($(name+'_busy')) { Element.hide(name+'_busy'); };
	if($(name+'_form')) { Element.show(name+'_form'); };
}
function show_link_div(name) {
	if($(name+'_busy')) { Element.hide(name+'_busy'); };
	if($(name+'_form')) { Element.hide(name+'_form'); };
	if($(name+'_link')) { Element.show(name+'_link'); };
}
function clear_form_div(name) {
	if($(name+'_form')) { $(name+'_form').innerHTML = ''; }
	if($(name+'_form')) { Element.hide(name+'_form'); };
	if($(name+'_busy')) { Element.hide(name+'_busy'); };
	if($(name+'_link')) { Element.show(name+'_link'); };
}
// methods to show/hide "AJAX" form spans in table rows.
function show_busy_row(name,id) {
	if($('tr_'+name+'_link_'+id)) { Element.hide('tr_'+name+'_link_'+id); };
	if($('tr_'+name+'_busy_'+id)) { Element.show('tr_'+name+'_busy_'+id); };
}
function show_link_row(name,id) {
	if($('tr_'+name+'_busy_'+id)) { Element.hide('tr_'+name+'_busy_'+id); };
	if($('tr_'+name+'_link_'+id)) { Element.show('tr_'+name+'_link_'+id); };
}
// methods to show/hide busy widgets
function show_busy_widget(name) {
	if($(name)) { Element.show(name); };
} 
function hide_busy_widget(name) {
	if($(name)) { Element.hide(name); };
}
// -------------------------------------------------------
function not_implemented_yet() { alert("This feature hasn't been implemented yet!"); return false; };
function popup_details(a) {
	return popup_window(a,false);
}
function popup_program(a) {
	return popup_window(a,true);
}
function popup_window(a,is_large) {
	var properties = 'titlebar=0,status=0,location=0,sizable=1,scrollbars=yes';
	if(is_large) {properties += ',width=800,height=600';} 
	else {properties += ',width=450,height=600';}
	
	var win = window.open(a.href,'details_window',properties);
	win.focus();
	return false;
}

// -------------------------------------------------------
function show_redcloth_help(url) {
	var features = 'width=600,height=500,resizable=yes,scrollbars=yes';
	window.open(url,'redcloth',features);
}


// validation methods
function validate_date(element,which_date) {
	var date_str = $F(element);
	if(date_str.length==0) { return true; }
	var pieces = date_str.split('/');
	var mon = -1;
	var day = -1;
	var year = -1;
	if(pieces.length == 3) {
		mon = Number(pieces[0]);
		day = Number(pieces[1]);
		year = Number(pieces[2]);
	} else {
		pieces = date_str.split('-');
		if(pieces.length == 3) {
			if(pieces[0]>'1900') {
				mon = Number(pieces[1]);
				day = Number(pieces[2]);
				year = Number(pieces[0]);
			} else {
				mon = Number(pieces[0]);
				day = Number(pieces[1]);
				year = Number(pieces[2]);
			}
		}
	}
	if((mon>=1&&mon<=12)&&(day>=1&&day<=31)&&(year>=1900)) {
		return true;
	}
	alert(which_date+' is invalid. Please enter date in MM/DD/YYYY format.');
	return false;
}