function image_off(imgname) {
      if (document.images) {
         document[imgname].src = eval(imgname + '_off.src');
         }
   }

   function image_on(imgname) {
      if (document.images) {
         document[imgname].src = eval(imgname + '_on.src');
         }
   }

   if (document.images) {

      feature_blattner_on = new Image(90, 60)
      feature_blattner_on.src = "images/portfolio/thumbs/green15_pic08_thumb.jpg"

      feature_blattner_off = new Image(90, 60)
      feature_blattner_off.src = "images/portfolio/thumbs/featured_blattner_thumb.jpg"

      feature_boos_on = new Image(90, 60)
      feature_boos_on.src = "images/portfolio/thumbs/green17_pic04_thumb.jpg"

      feature_boos_off = new Image(90, 60)
      feature_boos_off.src = "images/portfolio/thumbs/featured_boos_thumb.jpg"

      feature_brewster_on = new Image(90, 60)
      feature_brewster_on.src = "images/portfolio/thumbs/duchesne01_pic01_thumb.jpg"

      feature_brewster_off = new Image(90, 60)
      feature_brewster_off.src = "images/portfolio/thumbs/featured_brewster_thumb.jpg"

      feature_burk_on = new Image(90, 60)
      feature_burk_on.src = "images/portfolio/thumbs/bighole03_pic03_thumb.jpg"

      feature_burk_off = new Image(90, 60)
      feature_burk_off.src = "images/portfolio/thumbs/featured_burk_thumb.jpg"

      feature_christenson_on = new Image(90, 60)
      feature_christenson_on.src = "images/portfolio/thumbs/patagonia_pic03_thumb.jpg"

      feature_christenson_off = new Image(90, 60)
      feature_christenson_off.src = "images/portfolio/thumbs/featured_christenson_thumb.jpg"

      feature_crosland_on = new Image(90, 60)
      feature_crosland_on.src = "images/portfolio/thumbs/strawberry01_pic04_thumb.jpg"

      feature_crosland_off = new Image(90, 60)
      feature_crosland_off.src = "images/portfolio/thumbs/featured_crosland_thumb.jpg"

      feature_harper_on = new Image(90, 60)
      feature_harper_on.src = "images/portfolio/thumbs/green04_pic06_thumb.jpg"

      feature_harper_off = new Image(90, 60)
      feature_harper_off.src = "images/portfolio/thumbs/featured_harper_thumb.jpg"

      feature_mckinnon_on = new Image(90, 60)
      feature_mckinnon_on.src = "images/portfolio/thumbs/green16_pic13_thumb.jpg"

      feature_mckinnon_off = new Image(90, 60)
      feature_mckinnon_off.src = "images/portfolio/thumbs/featured_mckinnon_thumb.jpg"

      feature_morley_on = new Image(90, 60)
      feature_morley_on.src = "images/portfolio/thumbs/green17_pic03_thumb.jpg"

      feature_morley_off = new Image(90, 60)
      feature_morley_off.src = "images/portfolio/thumbs/featured_morley_thumb.jpg"

      feature_whittekiend_on = new Image(90, 60)
      feature_whittekiend_on.src = "images/portfolio/thumbs/strawberry02_pic05_thumb.jpg"

      feature_whittekiend_off = new Image(90, 60)
      feature_whittekiend_off.src = "images/portfolio/thumbs/featured_jswhittekiend_thumb.jpg"

      feature_rwhittekiend_on = new Image(90, 60)
      feature_rwhittekiend_on.src = "images/portfolio/thumbs/henrysfork06_pic03_thumb.jpg"

      feature_rwhittekiend_off = new Image(90, 60)
      feature_rwhittekiend_off.src = "images/portfolio/thumbs/featured_rwhittekiend_thumb.jpg"

      feature_sdwhittekiend_on = new Image(90, 60)
      feature_sdwhittekiend_on.src = "images/portfolio/thumbs/henrysfork05_pic10_thumb.jpg"

      feature_sdwhittekiend_off = new Image(90, 60)
      feature_sdwhittekiend_off.src = "images/portfolio/thumbs/featured_sdwhittekiend_thumb.jpg"

   }

   function checkForm(form)
   {
      if(form.v11193647.value == '') {
         alert("Please Enter Your Name");
         form.v11193647.focus();
         return false;
      }
      if(form.v11193647.value == 'Name') {
         alert("Please Enter Your Name");
         form.v11193647.focus();
         return false;
      }

      if(form.k18274648.value == '') {
         alert("Please Enter Your Email");
         form.k18274648.focus();
         return false;
      }

      // regular expression to match only accepted email conventions
      var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;

      // validation fails if the input doesn't match our regular expression
      if(!emailExp.test(form.k18274648.value)) {
         alert("Please Enter a Valid Email Format");
         form.k18274648.focus();
         return false;
      }

      if(form.r14263941.value == '') {
         alert("Please Enter Your Message");
         form.r14263941.focus();
         return false;
      }

      if(form.r14263941.value == 'Message') {
         alert("Please Enter Your Message");
         form.r14263941.focus();
         return false;
      }

      if(form.g18212743.value != '') {
         alert("alaBIFF.com does not accept SPAM or submissions via automated form completion. Please return and manually complete the form for resubmission. Thank you.");
         return false;
      }

      if(form.m14343536.value != '') {
         alert("alaBIFF.com does not accept SPAM or submissions via automated form completion. Please return and manually complete the form for resubmission. Thank you.");
         return false;
      }

      if(form.w21243841.value != '') {
         alert("alaBIFF.com does not accept SPAM or submissions via automated form completion. Please return and manually complete the form for resubmission. Thank you.");
         return false;
      }

      if(form.q18424749.value != '') {
         alert("alaBIFF.com does not accept SPAM or submissions via automated form completion. Please return and manually complete the form for resubmission. Thank you.");
         return false;
      }

      if(form.f06254647.value != '') {
         alert("alaBIFF.com does not accept SPAM or submissions via automated form completion. Please return and manually complete the form for resubmission. Thank you.");
         return false;
      }

      if(form.d16252742.value != '') {
         alert("alaBIFF.com does not accept SPAM or submissions via automated form completion. Please return and manually complete the form for resubmission. Thank you.");
         return false;
      }

      form.v11193647.name='required-your_name';
      form.k18274648.name='required-your_email';
      form.r14263941.name='required-your_message';

      // validation was successful
      return true;
   }