function addAd(form)
{
	if (validateAdForm(form)==false)
          return false;
     var url='modules.php?mod=adminads&req=add'+
      '&name='+form.name.value+
	  '&image='+form.image.value+
      '&url='+encodeURIComponent(form.URL.value);
     ret=serverFunction(url);
     displayText('maincontent','modules.php?mod=adminads');
     return false;

}

function validateAdForm(form)
{    
     var error_message = "The following required fields are missing:";
     var errors=0;
     if (isEmpty(form.name))
          {
          error_message = error_message + "\nAd Name";
          errors=1;
          }
     if (isEmpty(form.image))
          {
          error_message = error_message + "\nImage";
          errors=1;
          }
     if (isEmpty(form.URL))
          {
          error_message = error_message + "\nURL";
          errors=1;
          }               
     if (errors==0)
          return true;
     alert(error_message);
     return false;       
}

function deleteAd(form)
{
     var norecs=form.del.length;
     var url='modules.php?mod=adminads&req=delete'
     for (x=0, y=0; x < norecs; x++)
          {
          if (form.del[x].checked==true)
               {
               url+='&recno'+y+'='+form.recno[x].value;
               y++;
               }
          }
     url+='&norecs='+y;
     ret=serverFunction(url);
     displayText('maincontent','modules.php?mod=adminads');         
     return false;
}

function editAd(adid)
{
     displayText('maincontent','modules.php?mod=adminads&req=edit&id='+adid);
     return false;
}

function updateAd(form)
{
     var url='modules.php?mod=adminads&req=update'+
        '&id='+form.id.value+
		'&name='+form.name.value+
		'&image='+form.image.value+
	    '&url='+encodeURIComponent(form.URL.value);
     ret=serverFunction(url);
     displayText('maincontent','modules.php?mod=adminads');        
     return false;
}