// E-mail Validation by Henrik Petersen / NetKontoret
// Explained at www.echoecho.com/jsforms.htm
// Please do not remove this line and the two lines above.
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(firstname,"Please enter your first name")==false) {firstname.focus(); return false;};
	if (emptyvalidation(lastname,"Please enter your last name")==false) {lastname.focus(); return false;};	
	if (emailvalidation(email,"Please enter a valid email address")==false) {email.focus(); return false;};
	}
}