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

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


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

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

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

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

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

	switch (searchField.value)
	{
		case "":
		case "Add your search term here":
		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 elem, vis;  
	if( document.getElementById ) // this is the way the standards work    
		elem = document.getElementById( whichLayer );  
	else if( document.all ) // this is the way old msie versions work      
		elem = document.all[whichLayer];  
	else if( document.layers ) // this is the way nn4 works    
		elem = document.layers[whichLayer];  
		
	vis = elem.style;  // if the style.display value is blank we try to figure it out here  
		
	if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)    
		vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';  
	
	vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

function LayerOff( whichLayer )
{  
	var elem, vis;  
	if( document.getElementById ) // this is the way the standards work    
		elem = document.getElementById( whichLayer );  
	else if( document.all ) // this is the way old msie versions work      
		elem = document.all[whichLayer];  
	else if( document.layers ) // this is the way nn4 works    
		elem = document.layers[whichLayer];  
		
	vis = elem.style;  // if the style.display value is blank we try to figure it out here  
    vis.display = 'none';  
	
}