// #############################################################################
// let's find out what DOM functions we can use
var vbDOMtype = '';
if (document.getElementById)
{
	vbDOMtype = "std";
}
else if (document.all)
{
	vbDOMtype = "ie4";
}
else if (document.layers)
{
	vbDOMtype = "ns4";
}

// make an array to store cached locations of objects called by fetch_object
var vBobjects = new Array();

// #############################################################################
// function to emulate document.getElementById
function fetch_object(idname, forcefetch)
{
	if (forcefetch || typeof(vBobjects[idname]) == "undefined")
	{
		switch (vbDOMtype)
		{
			case "std":
			{
				vBobjects[idname] = document.getElementById(idname);
			}
			break;

			case "ie4":
			{
				vBobjects[idname] = document.all[idname];
			}
			break;

			case "ns4":
			{
				vBobjects[idname] = document.layers[idname];
			}
			break;
		}
	}
	
	return vBobjects[idname];
}

// #############################################################################
function manageattachments(url, width, height, hash)
{
	window.open("/" + url, "Attach" + hash, "statusbar=yes,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,width=" + width + ",height=" + height);
	return false;
}

// #############################################################################
// simple function to toggle the 'display' attribute of an object
function toggle_display(idname)
{
	obj = fetch_object(idname);

	if (obj)
	{
		if (obj.style.display == "none")
		{
			obj.style.display = "";
		}
		else
		{
			obj.style.display = "none";
		}
	}
	
	return false;
}

// #############################################################################
function verify_upload(formobj)
{
	var haveupload = false;
	for (var i=0; i < formobj.elements.length; i++)
	{
		var elm = formobj.elements[i];
		if (elm.type == 'file')
		{
			if (elm.value != "")
			{
				haveupload = true;
			}
		}
	}

	if (haveupload)
	{
		toggle_display('uploading');
		toggle_display('uploadinghide');
		return true;
	}
	else
	{
		alert("Please select a file to attach using the \"Browse...\" button.");
		return false;
	}
}