function validate_form ( )
{
    valid = true;

	    if (document.tellafriend.Email.value == "" || document.tellafriend.Email.value.indexOf("@") == -1 || document.tellafriend.Email.value.indexOf(".") == -1 )
    {
        alert ( "Please fill in the 'Email Address' box with a valid email address." );
        return false;
    } 
	
	    if (document.tellafriend.recipients.value == "" || document.tellafriend.recipients.value.indexOf("@") == -1 || document.tellafriend.recipients.value.indexOf(".") == -1 )
    {
        alert ( "Please fill in the 'Recipients Email Address' box with a valid email address." );
        return false;
    } 
	
		    if ( document.tellafriend.subject.value == "" )
    {
        alert ( "Please fill in the 'Subject' box." );
        return false;
    } 


    if ( document.tellafriend.priority.value == "" )
    {
        alert ( "Please fill in the 'Priority' box." );
        return false;
    } 
	
	    if ( document.tellafriend.messagebody.value == "" )
    {
        alert ( "Please fill in the 'Message Body' box." );
        return false;
    } 
	
	
    return valid;
}