var isMinNS4=(navigator.appName.indexOf("Netscape")>=0&&parseFloat(navigator.appVersion)>=4)?1:0;
var isMinIE4=(document.all)?1:0;
var isMinIE5=(isMinIE4&&navigator.appVersion.indexOf("5.")>=0)?1:0;

var isCostHelpOn=false;
var isMacHelpOn=false;
var isDrugHelpOn=false;
var isDoseHelpOn=false;

function CostHelpOn()
{
	if (isMacHelpOn)
	{
		MacHelpOff();
	}
	if (isDrugHelpOn)
	{
		DrugHelpOff();
	}
	if (isDoseHelpOn)
	{
		DoseHelpOff();
	}

	if (!isCostHelpOn)
	{
		var HelpWidth = document.all.CostHelp.clientWidth;
		var HelpHeight = document.all.CostHelp.clientHeight;
		var WindowWidth = document.body.clientWidth;
		var WindowHeight = document.body.clientHeight;

		document.all.CostHelp.style.pixelTop = (WindowHeight - HelpHeight) / 2;
		document.all.CostHelp.style.pixelTop += document.body.scrollTop;
	
		document.all.CostHelp.style.pixelLeft = (WindowWidth - HelpWidth) / 2;
		document.all.CostHelp.style.visibility = "visible";
		isCostHelpOn = true;
	}
	else
	{
		CostHelpOff();
	}
}

function MacHelpOn()
{
	if (isCostHelpOn)
	{
		CostHelpOff();
	}
	if (isDrugHelpOn)
	{
		DrugHelpOff();
	}
	if (isDoseHelpOn)
	{
		DoseHelpOff();
	}

	if (!isMacHelpOn)
	{
		var HelpWidth = document.all.MacHelp.clientWidth;
		var HelpHeight = document.all.MacHelp.clientHeight;
		var WindowWidth = document.body.clientWidth;
		var WindowHeight = document.body.clientHeight;

		document.all.MacHelp.style.pixelTop = (WindowHeight - HelpHeight) / 2;
		document.all.MacHelp.style.pixelTop += document.body.scrollTop;
	
		document.all.MacHelp.style.pixelLeft = (WindowWidth - HelpWidth) / 2;
		document.all.MacHelp.style.visibility = "visible";
		isMacHelpOn = true;
	}
	else
	{
		MacHelpOff();
	}
}

function DrugHelpOn()
{
	if (isCostHelpOn)
	{
		CostHelpOff();
	}
	if (isMacHelpOn)
	{
		MacHelpOff();
	}
	if (isDoseHelpOn)
	{
		DoseHelpOff();
	}

	if (!isDrugHelpOn)
	{
		var HelpWidth = document.all.DrugHelp.clientWidth;
		var HelpHeight = document.all.DrugHelp.clientHeight;
		var WindowWidth = document.body.clientWidth;
		var WindowHeight = document.body.clientHeight;

		document.all.DrugHelp.style.pixelTop = (WindowHeight - HelpHeight) / 2;
		document.all.DrugHelp.style.pixelTop += document.body.scrollTop;
	
		document.all.DrugHelp.style.pixelLeft = (WindowWidth - HelpWidth) / 2;
		document.all.DrugHelp.style.visibility = "visible";
		isDrugHelpOn = true;
	}
	else
	{
		DrugHelpOff();
	}
}

function DoseHelpOn()
{
	if (isCostHelpOn)
	{
		CostHelpOff();
	}
	if (isMacHelpOn)
	{
		MacHelpOff();
	}
	if (isDrugHelpOn)
	{
		DrugHelpOff();
	}

	if (!isDoseHelpOn)
	{
		var HelpWidth = document.all.DoseHelp.clientWidth;
		var HelpHeight = document.all.DoseHelp.clientHeight;
		var WindowWidth = document.body.clientWidth;
		var WindowHeight = document.body.clientHeight;

		document.all.DoseHelp.style.pixelTop = (WindowHeight - HelpHeight) / 2;
		document.all.DoseHelp.style.pixelTop += document.body.scrollTop;
	
		document.all.DoseHelp.style.pixelLeft = (WindowWidth - HelpWidth) / 2;
		document.all.DoseHelp.style.visibility = "visible";
		isDoseHelpOn = true;
	}
	else
	{
		DoseHelpOff();
	}
}

function CostHelpOff()
{
	document.all.CostHelp.style.visibility = "hidden";
	isCostHelpOn = false;
}

function MacHelpOff()
{
	document.all.MacHelp.style.visibility = "hidden";
	isMacHelpOn = false;
}

function DrugHelpOff()
{
	document.all.DrugHelp.style.visibility = "hidden";
	isDrugHelpOn = false;
}

function DoseHelpOff()
{
	document.all.DoseHelp.style.visibility = "hidden";
	isDoseHelpOn = false;
}