function checkForm()
{
	var cname, cemail, ctelephone, cmessage;
	with(window.document.msgform)
	{
		cname    = sname;
		cemail   = email;
		ctelephone = telephone;
		cmessage = message;
	}
	
	if(trim(cname.value) == '')
	{
		alert('Please enter your name');
		cname.focus();
		return false;
	}
	else if(trim(cemail.value) == '')
	{
		alert('Please enter your email');
		cemail.focus();
		return false;
	}
	else if(trim(ctelephone.value) == '')
	{
		alert('Please enter telephone number');
		ctelephone.focus();
		return false;
	}
	else if(trim(cmessage.value) == '')
	{
		alert('Please enter your message');
		cmessage.focus();
		return false;
	}
	else
	{
		cname.value    = trim(cname.value);
		cemail.value   = trim(cemail.value);
		ctelephone.value = trim(ctelephone.value);
		cmessage.value = trim(cmessage.value);
		return true;
	}
}

/*
Strip whitespace from the beginning and end of a string
Input : a string
*/
function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}