function PDTab( obj )
{
	var contentId = "pdContent_" + obj.innerHTML.replace(/\ /,"_");
	var tabs = document.getElementById( "productDetailNav" ).getElementsByTagName( "li" );

	for( var i = 0; i < tabs.length; i++ )
	{
		if( tabs[i].className == "selected" )
		{
			tabs[i].className = "";

			// replace with fade effect
			document.getElementById( "pdContent_" + tabs[i].getElementsByTagName( 'a' )[0].innerHTML.replace( /\ /, "_" ) ).style.display = "none";
		}
	}
	
	var productDetails = document.getElementById( "productDetails" );
	var newContent = document.getElementById( contentId );
	productDetails.appendChild( newContent );
	
	obj.parentNode.className = "selected";
	// replace with fade effect
	newContent.style.display = "block";
	
}