function omail(theField,txt) 
	{
	if (theField.value == "")
		{
		alert("Vous devez remplir le champ '" + txt + "'.");
		theField.focus();
		return false;
		}
	else
		{
		if (
			   (theField.value.indexOf("@",1)==-1)
			|| (theField.value.lastIndexOf(".")==-1)
			|| (theField.value.length-theField.value.lastIndexOf(".")<3)
			|| (theField.value.length-theField.value.lastIndexOf(".")>4)
			|| (theField.value.indexOf("@",1)>theField.value.lastIndexOf("."))
			|| (theField.value.lastIndexOf(" ")>0)
			|| (theField.value.indexOf("à")!=-1)
			|| (theField.value.indexOf("é")!=-1)
			|| (theField.value.indexOf("è")!=-1)
			|| (theField.value.indexOf("ù")!=-1)
			|| (theField.value.indexOf("ï")!=-1)
			|| (theField.value.indexOf("ç")!=-1)
			|| (theField.value.indexOf("..")!=-1)
			|| (theField.value.indexOf("!")!=-1)
			|| (theField.value.indexOf("@.")!=-1)
			|| (theField.value.indexOf(".@")!=-1)
			|| (theField.value.indexOf("www")!=-1)
			|| (theField.value.indexOf("aol.fr")!=-1)
			|| (theField.value.indexOf("wanadou")!=-1)
			|| (theField.value.indexOf(";")!=-1)
			)
			{
			alert("L'adresse e-mail indiquée est invalide.");
			theField.focus();
			return false;
			}
		
		}
	return true;
	}