function showhide(t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12)
{
		t1.style.display='';
		t2.style.display='none';
		t3.style.display='none';
		t4.style.display='none';
		t5.style.display='none';
		t6.style.display='none';
		t7.style.display='none';
		t8.style.display='none';
		t9.style.display='none';
		t10.style.display='none';
		t11.style.display='none';
		t12.style.display='none';		
		
}
	

function showhide2(what,what2){
	if (what.style.display=='none'){
		what.style.display='';
		what2.style.display='none';
	}else{
		what.style.display='none';
		what2.style.display='';
	}
}