/*
	* ShowFiltr
	* 
	* return void		
	*/
	function ShowFiltr( filter_id )
	{
		document.getElementById( filter_id ).style.display = 'block';
		
	}//func	

	
	/*
	* HideFiltr
	* 
	* return void		
	*/
	function HideFiltr( filter_id )
	{
		document.getElementById( filter_id ).style.display = 'none';
		
	}//func
	
	
	/*
	* ChangeFiltr
	* 
	* return void		
	*/
	function ChangeFiltr( filter_id )
	{
		var filter = document.getElementById( filter_id );
		
		filter.style.display = ( filter.style.display == 'none' ) ? 'block' : 'none';
		
	}//func