function validate(form) {

	with(form) {
		if(emptyvalidation(email, "Please enter your E-mail address")==false) {email.focus(); return false;}
		else if(emailvalidation(email, "E-mail address doesn't seem to be valid")==false) {email.focus(); return false;}

    form.submit();
	}
}

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

function emailvalidation(entered, alertbox)
{
	with (entered)
	{
		if (value==null || value=="") return true;

		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		lastpos=value.length-1;
		if (apos<1 || dotpos-apos<2 || lastpos-dotpos>4 || lastpos-dotpos<2)
		{	if (alertbox)
			{
				alert(alertbox);
			}
			return false;
		}
		else
		{
			return true;
		}
	}
}

function clearText(thefield){
  if (thefield.defaultValue==thefield.value)
  thefield.value = ""
}