// JavaScript Document
function toggle( obj, imgObj )
{
	try
	{
		if ( obj.style.display == 'block' )
		{
			obj.style.display = 'none';
			imgObj.className = 'plus';
		} // end if
		else
		{
			obj.style.display = 'block';
			imgObj.className = 'minus';								
		} // End else
	} // end try
	catch( err )
	{ /* Do Nothing */ }
} // end toggle

function expandTree( tree )
{
	try
	{
		ulArray = tree.getElementsByTagName("ul");																	
		for ( i = 0; i < ulArray.length; i=i+1 )
		{
			ulArray[i].style.display = 'block';
		}
		
		imgArray = tree.getElementsByTagName("img");
		for ( i = 0; i < imgArray.length; i=i+1 )
		{
			imgArray[i].className = 'minus';
		}						
	}
	catch ( err )
	{
		alert( err );
	}
} // end expandTree				

function collapseTree( tree )
{
	ulArray = tree.getElementsByTagName("ul");
	
	for ( i = 1; i < ulArray.length; i=i+1 )
	{
		ulArray[i].style.display = 'none';
	}
	
	imgArray = tree.getElementsByTagName("img");
	for ( i = 0; i < imgArray.length; i=i+1 )
	{
	  imgArray[i].className = 'plus';
	}
	
} // End collapseTree