function formfmValidate(arg)
{
	switch (arg) {
		case 'newdir':
		case 'newfile':
			var name = prompt(get_lang('Enter with the name of new file/directory'), '');
			var input_text = document.getElementById('newfile_or_dir');
			if (name == null || ! validateFileExtension(name))
			{
				return false;
			}
			else
			{
				var fileExtension = name.split(".");
			        fileExtension = fileExtension[1];
				if (typeof(fileExtension) == 'undefined')
					input_text.value = name+".html";
				else
					input_text.value = name;
				return true;
			}
			break
		case 'edit_comments':
		case 'rename':
		case 'delete':
		case 'edit':
			var one_checked = false;
			files=document.getElementsByClassName('checkbox');
			for (i = 0; i <  files.length; i++)
				if (files[i].checked)
					one_checked = true;
			if (one_checked)
				return true;
			else
			{
				alert(get_lang('Please select a file'));
				return false;
			}
		default:
			return true;
	}
}

var denyFileExtensions = new Array('exe','com','reg','chm','cnf','hta','ins',
					'jse','job','lnk','pif','src','scf','sct','shb',
					'vbe','vbs','wsc','wsf','wsh','cer','its','mau',
					'mda','mar','mdz','prf','pst');
function validateFileExtension(fileName){
	var error_flag = false;
	var fileExtension = fileName.split(".");
	fileExtension = fileExtension[(fileExtension.length-1)];
	for(var i=0; i<denyFileExtensions.length; i++)
	{
		if(denyFileExtensions[i] == fileExtension)
		{
			error_flag = true;
			break;
		}

	}

	if ( error_flag == true )
	{
		alert(get_lang('File extension forbidden or invalid file') + '.');
		return false;
	}
	return true;
}

function get_lang(_key){
	var key = _key.toLowerCase();
	if(array_lang[key])
		var _value = array_lang[key];
	else
		var _value = _key+"*";

	if(arguments.length > 1)
		for(j = 1; typeof(arguments[j]) != 'undefined'; j++)
			_value = _value.replace("%"+j,arguments[j]);
	return _value;

}