function validform()
{
	document.forms[0].nom.className  = 'size nowarn';
	document.forms[0].email.className  = 'size nowarn';
	document.forms[0].subject.className  = 'size nowarn';
	document.forms[0].body.className  = 'nowarn';
	
	if(document.forms[0].nom.value == '')
	{
		document.forms[0].nom.focus();
		document.forms[0].nom.className = 'warn';
		return false;
	}

	if(document.forms[0].email.value == '')
	{
		document.forms[0].email.focus();
		document.forms[0].email.className = 'warn';
		return false;
	}

	if(document.forms[0].subject.value == '')
	{
		document.forms[0].subject.focus();
		document.forms[0].subject.className = 'warn';
		return false;
	}

	if(document.forms[0].body.value == '')
	{
		document.forms[0].body.focus();
		document.forms[0].body.className = 'warn';
		return false;
	}


	document.forms[0].submit();
}