function clearTextField( fname )
{
   fname.value = ''; 
}

/**
 * Popups a new a window with width and height
 * with default parameters. No location, menubar or toolbars.
 * Can be resized and scrolled.
 * @param string url The url of the popup window
 * @param int width The width of the popup window
 * @param int height The height of the popup window
 */
function popup(url, width, height)
{
	var win = window.open(url, 'popup', 'width='+width+',height='+height+',location=no,menubar=no,toolbar=no,resizable=yes');
	win.focus();
}