function sendContactUs(form)
{
     if (!validateContactUsForm(form))
          return false;

     var url='modules.php?mod=contactus&req=send'+
               '&yourname='+form.yourname.value+
               '&email='+form.email.value+
               '&body='+escape(form.body.value);
     displayText('maincontent',url);     
}

function validateContactUsForm(form)
{

     var error_message = "The following errors occurred:";
     var errors=0;
     if (isEmpty(form.yourname))
          {
          error_message = error_message + "\n\tYour name is missing";
          errors=1;
          }
     if (isEmpty(form.body))
          {
          error_message = error_message + "\n\tThe message is missing";
          errors=1;
          }
     if (isEmpty(form.email))
          {
          error_message = error_message + "\n\tEmail address is missing";
          errors=1;
          }
     if (!isEmpty(form.email) && !validEmail(form.email.value))
          {
          error_message = error_message + "\n\tEmail address is improperly formatted";
          errors=1;
          }


     if (errors==0)
          return true;
     alert(error_message);
     return false;       
}