function emailvalidation(entered, alertbox)
	{
	with (entered)
	{
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		lastpos=value.length-1;
		if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2) 
			{if (alertbox) {alert(alertbox);} return false;}
		else {return true;}
	}
}

function emptyvalidation(entered, alertbox)
	{
	with (entered)
	{
		if (value==null || value=="")
			{if (alertbox!="") {alert(alertbox);} return false;}
		else {return true;}
	}
}

function formvalidation(thisform)
	{
	with (thisform)
	{
		if (emptyvalidation(name,"Please enter your name")==false) {name.focus(); return false;};
		if (emailvalidation(email,"Please enter a valid email address")==false) {email.focus(); return false;};
		if (emptyvalidation(message,"Please provide the nature of your enquiry")==false) {message.focus(); return false;};	
	}
}