function showHideTables(tvalue) {
	for (i=1;i<=5;i++)	//where 5 is the total available tables.
	{
		if (i == tvalue)	//make Table <tvalue> visible
		{
			document.all["tbl" + i].style.display = "";
		}
		else				//All other tables are made invisible
		{
			document.all["tbl" + i].style.display = "none";
		}
	}
}