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 (typeof email != 'undefined') {
		if (emailvalidation(email,"Please enter a valid email address!")==false) {email.focus(); return false;};
		}
		

		if (typeof message != 'undefined') {
			if (emptyvalidation(message,"Please type your message!")==false) {message.focus(); return false;};
		}
	}
}