function showTop1Menu(block)
{
	var s_i,e_i;
	if (block < 3) {
		s_i = 1;
		e_i = 2;
	}
	else if (block <5) {
		s_i = 3;
		e_i = 4;
	}
	
	hideTop1Menu(s_i,e_i);
	var obj = MM_findObj("main_area"+block);	
	obj.style.display = ""; 
}
function hideTop1Menu(s_i,e_i)
{
	var obj;
	for (var i=s_i; i<= e_i; i++)
	{		
		obj = MM_findObj("main_area"+i);		
		obj.style.display = "none";
	}
}


function MM_swapImgRestore2() { //v3.0
  var i2,x2,a2=document.MM_sr2; for(i2=0;a2&&i2<a2.length&&(x2=a2[i2])&&x2.oSrc;i2++) x2.src=x2.oSrc;
}
function MM_swapImage2() { //v3.0
  var i2,j2=0,x,a2=MM_swapImage2.arguments; document.MM_sr2=new Array; for(i2=0;i2<(a2.length-2);i2+=3)
   if ((x2=MM_findObj(a2[i2]))!=null){document.MM_sr2[j2++]=x2; if(!x2.oSrc) x2.oSrc=x2.src; x2.src=a2[i2+2];}
}