function change(obj, image, action)
		{
			
			if(action == 0)
			{
				img = obj.getElementsByTagName('img')[0];
				img.src='/img/' + image  + '_hover.gif';
			}
			else
			{
				img = obj.getElementsByTagName('img')[0];
				img.src='/img/' + image  + '.gif';
			}
		}
		
		function change2(obj, image, action)
		{
			
			if(action == 0)
			{
				//
				img = obj.getElementsByTagName('img')[0];
				img.src='/img/' + image  + '_hover.jpg';
					
			}
			else
			{
				img = obj.getElementsByTagName('img')[0];
				img.src='/img/' + image  + '.jpg';
				
			}
		}
		function change3(img, image, action)
		{
			
			if(action == 0)
			{
				//
				img.style.backgroundimage='./img/' + image  + '_hover.jpg';
				
					if (image == 'jakNakupovat')
						img = document.getElementById('questionMark');
					else if (image = 'kontakt')
						img = document.getElementById('questionMark2');
									
				img.style.visibility = "hidden";
			}
			else
			{
				img.style.backgroundimage='./img/' + image  + '.jpg';
				
				if (image == 'jakNakupovat')
					img = document.getElementById('questionMark');
				else if (image = 'kontakt')
					img = document.getElementById('questionMark2');
									
				img.style.visibility = "visible";
			}
		}
		
		function buttonChange(btn,jak)
		{
			if(jak == 1)
			{
				btn.style.color = '#000000';
				btn.style.backgroundImage="url(/img/buttonWhite_hover.jpg)";
			}
			else
			{
				btn.style.color = '#FFFFFF';
				btn.style.backgroundImage="url(/img/buttonWhite.jpg)";
			}
		}
		
		function buttonChange2(btn,jak)
		{
			if(jak == 1)
			{
				btn.style.color = '#000000';
				btn.style.backgroundImage="url(../img/buttonWhite_hover.jpg)";
			}
			else
			{
				btn.style.color = '#FFFFFF';
				btn.style.backgroundImage="url(../img/buttonWhite.jpg)";
			}
		}
		
		function test_zero(obj)
		{
		  var pom = obj.getElementsByTagName("INPUT");
		  for(i = 0; i < pom.length; i++)
		  {
		    if(pom[i].type == "text")
		      {
		        if(pom[i].value != 0)
		        {
		          return true;
            }
		      }
		  }
		  alert("Je třeba zadat množství");
		  return false;
    }