function check_input()  
{  
	if (Frm.writer.value=="")
	{   alert("Please fill in your Name!");
		return false;
	}
    if (Frm.email.value=="" )
	{   alert("Please fill in your E-mail!");
		return false;
	 }
    if ((Frm.email.value.indexOf("@")<0)||(Frm.email.value.indexOf(":")!=-1))
     {
                        alert("Error:\n\n Email address error! Please fill in a valid email address\n\n");
                        Frm.email.focus();
                        return false;
     }
	if (Frm.title.value=="")
	{   alert("Please fill in your Theme!");
		return false;
	}
    if (Frm.tel.value=="" )
	{   alert("Please fill in your Telephone!");
		return false;
	}
	return true;
}