/*----------------------------------------------------------------------------*-
Function:
	$include
Params:
	file - File to include.
Return:
	-
Notes:
	Includes a script into the current document to import all their functions
	etc.  Checks for prior inclusions and only include if required.
-*----------------------------------------------------------------------------*/

var
	YSI_g_headElement = null;

$include = function (file)
{
	if ($if.lr[$if.lr.length - 1] == 1)
	{
		var
			ext = file.lastIndexOf('.');
		if (ext == -1)
		{
			return;
		}
		var
			name = file.substring(0, ext);
		// Check if there's an array list of scripts
		if ($include._scripts)
		{
			// Check if this script is included already
			if ($include._scripts[name])
			{
				// Yes, exit
				return;
			}
		}
		else
		{
			// No array, create one
			$include._scripts = [];
		} 
		// This script doesn't exist so mark it as now included
		// Create the code to go into the browser
		try
		{
			var
				script = document.createElement('script');
			if (script)
			{
				script.src = file;
				script.language = 'JavaScript1.2';
				script.type = 'text/javascript';
				script.defer = false;
				if (!YSI_g_headElement)
				{
					YSI_g_headElement = $tag('head');
				}
//				if (YSI_g_headElement)
//				{
//					YSI_g_headElement.insertBefore(script, YSI_g_headElement.firstChild);
				YSI_g_headElement.appendChild(script);
				$include._scripts[name] = true;
//				}
			}
		}
		catch (e)
		{
			throw e;
		}
	}
}