function ShowMenu(i,j,n)
{
	var Pro_Class_ID;
	var iNum;

	if ((i>0)&&(j==0))
	{
		Pro_Class_ID = eval("Pro_Class_" + i);
		Pro_Class_ID.style.display=Pro_Class_ID.style.display=='none'?'':'none'
	}

	if ((i>0)&&(j==0))
	{
		for (iNum=1;iNum<=n;iNum++)
		{
			if (i!=iNum)
			{
				Pro_Class_ID = eval("Pro_Class_" + iNum);
				Pro_Class_ID.style.display="none";
			}
		}
	}

	if (j>0)
	{
		Pro_Class_ID = eval("Pro_Class_" + i + j);
		Pro_Class_ID.style.display=Pro_Class_ID.style.display=='none'?'':'none'
	}

	if (j>0)
	{
		for (iNum=1;iNum<=n;iNum++)
		{
			if (j!=iNum)
			{
				Pro_Class_ID = eval("Pro_Class_" + i + iNum);
				Pro_Class_ID.style.display="none";
			}
		}
	}

}