function getStyle(x)
   {
      var temp = document.getElementById("main"+x).style.visibility;
  
      return temp;
   }

function blankAll()
	{
		for(i=1;i<=6;i++)
		{
			document.getElementById("main"+i).style.visibility = "hidden";
		}
	}

 function switchMain(x)
  {
	//alert("switchmain");
	blankAll()
	  
	if( x == 0 )
		{

		}
	else
		{
			//var current = getStyle(x);
			document.getElementById("main"+x).style.visibility = "visible";
		}		
  }