function checkSearch()
{
	var searchField = document.getElementById('sKeywords');

	switch (searchField.value)
	{
		case "":
		case "Please enter your search term":
		case "Enter Keywords":
			window.alert("Please enter a search term.");
			searchField.focus();
			return false;
	}
}

function clearDefault()
{
	var searchField = document.getElementById('sKeywords');

	switch (searchField.value)
	{
		case "Please enter your search term":
			searchField.value = "";
			return;
	}
}

function bucketTypeTabOnClick(bucketType)
{
	var searchField = document.getElementById('sKeywords');

	switch (searchField.value)
	{
		case "":
		case "Please enter your search term":
		case "Enter Keywords":
			window.alert("Please enter a search term.");
			searchField.focus();
			return false;
	}

	document.ZibbSearchForm.searchType.value = bucketType;
	document.ZibbSearchForm.submit();
	return false;
}

function searchFieldSetFocus()
{
	var searchField = document.getElementById('sKeywords');
	if (searchField != null)
	{
		searchField.focus();
	}
}

function toggleLayer(whichLayer)
{
    var styleSheet;

    if(document.getElementById(whichLayer) != null)
    {    
        if (document.getElementById)
        {
            // this is the way the standards work
            styleSheet = document.getElementById(whichLayer).style;
        }
        else if (document.all)
        {
            // this is the way old msie versions work
            styleSheet = document.all[whichLayer].style;
        }
        else if (document.layers)
        {
            // this is the way nn4 works
            styleSheet = document.layers[whichLayer].style;
        }

        styleSheet.display = styleSheet.display? "":"block";
    }
}