function changeImg(id, img)
{
	getObject(id).src = img;
}

function deleteConfirm(id)
{
	getObject('delete_id').value = id;
	
	var fRet;
	fRet = confirm('Are you sure that you wish to delete this score?');
	if(!fRet)
	{
		return false;
	}
}

function checkForm(type)
{
	var error = "";
	if(getObject('ver').value == "")
	{
		error = error + "- enter software version\r\n";
	}
	if(getObject('em').value == '')
	{
		error = error + "- enter your e-mail\r\n";
	}
	else if(!checkmail(getObject('em').value))
	{
		error = error + "- entered e-mail is invalid\r\n";
	}
	if(getObject('txt').value == "")
	{
		error = error + "- enter your message\r\n";
	}

	if(error != "")
	{
		error = "Please fill in all the fields.\r\n\r\n" + error + "";
		alert(error);
		return false;
	}
	else
	{
		getObject('contact').submit();
	}
}

function checkmail(text)
{
	if (text == '')
	{
		return false;
	}

	if (text.indexOf('.') == -1)
	{
		return false;
	}

	dog = text.indexOf('@');
	if (dog == -1)
	{
		return false;
	}

	if ((dog < 1) || (dog > text.length - 5))
	{
		return false;
	}

	if ((text.charAt(dog - 1) == '.') || (text.charAt(dog + 1) == '.'))
	{
		return false;
	}

	return true;
}

function getObject(objectId)
{
	if(document.getElementById && document.getElementById(objectId))
	{
		return document.getElementById(objectId);
	}
	else if (document.all && document.all(objectId))
	{
		return document.all(objectId);
	}
	else if (document.layers && document.layers[objectId])
	{
		return document.layers[objectId];
	}
	else
	{
		return false;
	}
}