function showhid(obj)
 { 
 	for (i=0; i<10;i++)
	{
		if (i==obj )
		{
			document.getElementById("m_1_" +i).className="m_1_a";
			document.getElementById("m_2_" +i).className="m_2_a";		
		
		}
		else 
		{
		        document.getElementById("m_1_" +i).className="m_1";
			document.getElementById("m_2_" +i).className="m_21";
		}
	}	
 }

function showhid_id(obj)
 { 
 	for (i=0; i<5;i++)
	{
		if (i==obj )
		{
			document.getElementById("m_11_" +i).className="m_11_a";
			document.getElementById("m_21_" +i).className="m_21_a";		
		
		}
		else 
		{
		        document.getElementById("m_11_" +i).className="m_11";
			document.getElementById("m_21_" +i).className="m_211";
		}
	}	
 }