// JavaScript Document
function validate_required(field,alerttxt)
{
	with (field)
	{
	if (value==null||value=="")
	  {
	  	alert(alerttxt);
	  	return false;
	  }
	else 
	{
		return true
	}
}
}
function validate_email(field,alerttxt)
{
with (field)
{
	apos=value.indexOf("@");
	dotpos=value.lastIndexOf(".");
	if (apos<1 || dotpos-apos<2) 
	  {alert(alerttxt);return false;}
	else {return true;}
	}
}
function validate_form(thisform)
{
	with (thisform)
	{
	if (validate_required(sender,"Please input your name.")==false)
	  {sender.focus();return false;}
	if (validate_email(email,"Please input valid email")==false)
	  {email.focus();return false;}
	if (validate_required(msg,"Please write a message")==false)
	  {msg.focus();return false;}
	  
	if(copytoyou.checked)
	  	{
	  		sendcopy.value = "yes";
		}
		else
		{
			sendcopy.value = "no";
		}
	}
	return true;
}