window.menu_en = true;
flag_pf = true;
flag_tm = true;
flag_in = true;

function getElementPosition(block_id)
	{
		var block = document.getElementById(block_id);
		var w = block.offsetWidth;
		var h = block.offsetHeight;
		var l = 0;    var t = 0;
		while (block)    
			{
				l += block.offsetLeft;        
				t += block.offsetTop;        
				block = block.offsetParent;    
			}    
		return {"left":l, "top":t, "width": w, "height":h};
	}

function show_block(block_id, down_till)
	{
	if(window.menu_en == true)
		{
			window.menu_en = false;
			window["flag_"+block_id]=!window["flag_"+block_id];
			block_pos = 1;	
			function plus_px () 		
					{ 
						var bl = document.getElementById(block_id);
						bl.style.height = block_pos;
						block_pos+=(down_till-block_pos)/15; 
						if(block_pos>=(down_till-1))
							{
								clearInterval(move_down);
								window.menu_en = true;
							}
					}
			move_down = setInterval(plus_px, 7);
		}	
	}
	
function hide_block(block_id)
	{
	if(window.menu_en == true)
		{
			window.menu_en = false;
			window["flag_"+block_id]=!window["flag_"+block_id];
			block_cor = getElementPosition(block_id);
			block_pos = block_cor.height;
			function minus_px () 		
					{ 
						var bl = document.getElementById(block_id);
						bl.style.height = block_pos;
						block_pos+=(1-block_pos)/15;
						if(bl.style.height =="1px")
							{
								clearInterval(move_up);
								window.menu_en = true;
							}
					}
			move_up= setInterval(minus_px, 7);
		}	
	}