function SummerRoute_OnChange()
{
    if(document.TimetableQuery.drpRouteSummer.value == '0')
    {
        document.TimetableQuery.drpFromSummer.options(0).text = '-- Please Select Route --';
        document.TimetableQuery.drpToSummer.options(0).text = '-- Please Select Route --';
        document.TimetableQuery.drpFromSummer.disabled=true;
        document.TimetableQuery.drpToSummer.disabled=true;
        document.TimetableQuery.drpFromSummer.value = 0;
        document.TimetableQuery.drpToSummer.value = 0;
        ShowDropDowns(true);
    }
    if(document.TimetableQuery.drpRouteSummer.value == '1')
    {
        ShowDropDowns(false);
    }
    if(document.TimetableQuery.drpRouteSummer.value == '3')
    {
        document.TimetableQuery.drpFromSummer.disabled=false;
        document.TimetableQuery.drpToSummer.disabled=false;
        ShowDropDowns(true);
		//document.getElementById('drpFromSummer').options[0].text = '-- Please Select --';
		document.getElementById('drpToSummer').options[0].text = '-- Please Select --';
        document.TimetableQuery.drpFromSummer.options[0].text = '-- Please Select --';
        //document.TimetableQuery.drpToSummer.options(0).text = '-- Please Select --';
    }
}

function ShowDropDowns(IsSummer)
{
    if(IsSummer)
    {
        ShowElementByID('divFromSummer');
        ShowElementByID('divToSummer');
        HideElementByID('divFromRegular');
        HideElementByID('divToRegular');
    }
    else{
        HideElementByID('divFromSummer');
        HideElementByID('divToSummer');
        ShowElementByID('divFromRegular');
        ShowElementByID('divToRegular');
    }
}

function ShowElementByID(id) 
{
	document.getElementById(id).style.display = 'block';
	document.getElementById(id).style.visibility = 'visible';
}

function HideElementByID(id) 
{
	document.getElementById(id).style.display = 'none';
}


function removeAllOptions(DropDown)
{
	var i;
	for(i=DropDown.options.length-1;i>=0;i--)
	{
		DropDown.remove(i);
	}
}

function addOption(DropDown, value, text )
{
	var optn = document.createElement('OPTION');
	optn.text = text;
	optn.value = value;
	DropDown.options.add(optn);
}