var SID = '';
// whether to ask confirmation before action or not: 0 - no, 1 - yes
//var dont_ask = 1;

// available actions
var actions = [ 4, 256, 32, 128, 1024, 512, 64 ];

// Current states of checkboxes in action-columns.
var state_4 = false;
var state_256 = false;
var state_32 = false;
var state_128 = false;
var state_1024 = false;
var state_512 = false;
var state_64 = false;
	
/*
* Clears values of given form fields.
*/
function clearFields( form, field_name1 )
{
	if ( ! form || arguments.length < 2 ) return;
	
	for ( var i = 1; i < arguments.length; i++ ) {
		var field = eval( 'form.' + arguments[i] );
		if ( field ) field.value = '';
	}
}

/*
* Does some action by replacing URL of current document location.
* If 'cfrm'-parameter is 1, then confirm-dialog is executed before real action.
*/
function doAction( url, cfrm )
{
	if ( ! cfrm || confirm( 'Are you sure?' )) {
		url = url + (( url.indexOf ('?') > -1 ) ? '&' : '?') + SID;
		document.location.replace( url );
	}
}

/*
* Gets values of checked checkboxes in listings according to given action and frame.
* If frame isn't given, then checkboxes are assumet to be in current frame.
*/
function getChecked( act, frame )
{
	if ( ! IS_MOZ && ! IS_IE ) return;
	
	var out = '';
	var objs = ( frame ? frame.document.getElementsByTagName( 'input' ) : document.getElementsByTagName( 'input' ));
	if ( ! objs ) return;
	
	for ( i = 0; i < objs.length; i++ ) { 
		if ( objs[i].name == 'id[' + act + '][]' && objs[i].checked == true ) {
			out = out + ( out != '' ? ',' : '' ) + objs[i].value;
		}
	}
	
	return out;
}

/*
* Goes back from view to listing.
*/
function goBack( where )
{
	if ( document.form.back_url ) {
		document.location.replace( document.form.back_url.value );
	} else {
		document.form.act.value = 1;
		document.form.submit();
	}
}

/*
* Updates lock of object, which is opened in change-form.
*/
function lockObject() 
{
	if ( typeof LOCK_URL == 'undefined' )
		return;
		
	addScript( LOCK_URL );
}

/*
* Refreshes content of form.
*/
function refreshForm()
{
	if ( document.form.act.value == 16 ) {
		document.form.done.value = 1;
	}
	document.form.submit();
}

/*
* Selects/unselects action-column of checkboxes in listings according to given action.
*/
function selectAll( act )
{
	if ( ! IS_MOZ && ! IS_IE ) return;
	
	var state = eval( 'state_' + act );
	var objs = document.getElementsByTagName( 'input' );
	if ( ! objs ) return;
	
	// check/uncheck all checkboxes of column
	for ( var i = 0; i < objs.length; i++ ) { 
		if ( objs[i].name == 'id[' + act + '][]' ) {
			objs[i].checked = ( state == true ? false : true );
			toggleSelected( objs[i] );
		}
	}
	
	// set global states of action-columns
	for ( var i = 0; i < actions.length; i++ ) {
		
		// toggle state of given action
		if ( act == actions[i] )
			eval( 'state_' + actions[i] + ' = ( state == true ? false : true );' );
		
		// unselect states of other actions
		else
			eval( 'state_' + actions[i] + ' = false;' );
	}
	
	toggleAdmButtons();
}

/*
* Sets value of field according to given field name.
* 
* Accepts more than one field and value, i.e. setValue( 'field1', 0, 'field2', 12, 'field3', 'abc' )
*/
function setValue( field1, value1 )
{
	var f = document.form;
	if ( ! f ) return;
	
	for ( var a = 0; a < arguments.length; a += 2 ) {
		var field = arguments[a];
		var value = arguments[a+1];
		for ( var i = 0; i < f.elements.length; i++ ) {
			if ( f.elements[i].name == field ) {
				f.elements[i].value = value;
			}
		}
	}
}

/*
* Submits form for generating some action.
* If 'cfrm'-parameter is 1, then confirm-dialog is executed before real action.
*/
function submitForm( act, cfrm, popup_name, popup_w, popup_h )
{
	var f = document.form;
	f.target = '_self';

	if ( ! cfrm || confirm( 'Are you sure?' )) {
	
		// current action won't change, i.e. saving form data
		if ( ! act ) {
			if ( f.act && f.act.value == 16 ) {
				f.done.value = 2;
			} else if ( f.act && f.act.value == "inc" ) {
				f.done.value=parseInt(f.done.value)+1;
			}
			else {
				f.done.value = 1;
			}
			
		// change current action: set permissions or go from view to change
		} else if ( act == 1024 || ( f.act.value == 2 && act == 16 )) {
			if ( popup_name ) {
				var win = openPopup( '', popup_name, popup_w, popup_h );
				if ( win ) {
					var save_target = f.target;
					var save_act = f.act.value;
					var save_done = f.done.value;
					f.popup.value = act;
					f.target = popup_name;
				}
			}
			f.act.value = act;
			f.done.value = 0;
		
		// change current action: others
		} else {
			if ( act == 16384 ) {
				var save_act = f.act.value;
			}
			f.act.value = act;
			if ( act == 2 ) {
				f.done.value = 0;
			}
		}
		f.submit();
		if ( save_target ) f.target = save_target;
		if ( save_act ) f.act.value = save_act;
		if ( save_done ) f.done.value = save_done;
		if ( f.popup ) f.popup.value = 0;
	}
}

/*
* Submits form if ENTER-key is pressed in some textfield. Use this function in 'onKeyUp'-property of textfields.
*/
function submitFormOnEnter( event )
{
	var ok = 0;
	
	if ( IS_MOZ && event && event.which == 13 ) {
		ok = 1;
	} else if ( IS_IE && window.event.keyCode == 13 ) {
		ok = 1;
	}
	
	if ( ok ) {
		submitForm.arguments = submitFormOnEnter.arguments;
		submitForm();
	}
}

/*
* Shows/hides AdmButtons of action-columns.
* Appropriate AdmButton will be shown if at least one checkbox of action-column is checked.
*/
function toggleAdmButtons()
{
	if (( ! IS_MOZ && ! IS_IE )) return;
	
	var objs = document.getElementsByTagName( 'input' );
	if ( ! objs ) return;
	
	for ( var i = 0; i < actions.length; i++ ) {
		var admbutton = document.getElementById( 'admbutton_' + actions[i] );
		if ( ! admbutton ) continue;
	
		var display = 'none';
		for ( var j = 0; j < objs.length; j++ ) { 
			var name = objs[j].name;
		
			// at least one checked checkbox is found
			if ( name == 'id[' + actions[i] + '][]' && objs[j].checked ) {
				display = 'block';
				break;
			}
		}
		admbutton.style.display = display;
	}
}

/*
* Selects/unselects cells of table row, which contain given checkbox.
*/
function toggleSelected( checkbox )
{
	if (( ! IS_MOZ && ! IS_IE ) || ! checkbox || ! checkbox.parentNode || ! checkbox.parentNode.parentNode ) return;
	
	// given table row
	var row = checkbox.parentNode.parentNode;
	
	// go through cells of row
	for ( var i = 0; i < row.cells.length; i++ ) {
		var className = row.cells[i].className;
		
		// remove cell highlighting
		className = className.replace( / highlight/, "" );
		
		// select/unselect cell
		row.cells[i].className = ( 
			checkbox.checked == true ? 
			( className.indexOf( 'selected' ) == -1 ? ( className + ' selected' ) : className ) : 
			className.replace( / selected/, "" )
		);
		
		// uncheck other checkboxes in same row
		if ( row.cells[i].childNodes.length ) {
			var firstChild = row.cells[i].firstChild;
			if ( firstChild.tagName == 'INPUT' && ( firstChild.name != checkbox.name )) {
				firstChild.checked = false;
			}
		}
	}

	toggleAdmButtons();
}

/*
* Reoves lock of object, which is opened in change-form of popup window.
*/
function unlockObject() 
{
	if ( typeof UNLOCK_URL == 'undefined' )
		return;
	
	addScript( UNLOCK_URL );
}

if ( typeof openPopup == "undefined") {
	/*
	* Opens popup window in center of the screen.
	*/
	function openPopup( url, name, width, height, prop )
	{
		var left = Math.floor( screen.availWidth / 2 ) - Math.floor( width / 2 );
		var top = Math.floor( screen.availHeight / 2 ) - Math.floor( height / 2 );
		if ( ! prop ) prop = 'location=no,resizable=yes,menubar=no,status=yes,scrollbars=yes'
	
		if ( SID ) {
			url = url + (( url.indexOf ('?') > -1 ) ? '&' : '?') + SID;
		}
		
		var win = window.open( url, name, 'width=' + width + ',height=' + height + ',left=' + left + ',top=' + top + ',' + prop );
			
		if ( win ) win.focus();
		
		return win;
	}
}