function preset()
{  var locString = new String (document.location);
   var sample = locString.substring(locString.indexOf('?') + 1);
   
   if (sample != locString)
   {  var clientCol = 'clientCol' + sample.substring(0,1);
      var sampleImage = 'sample' + sample;
      var serviceText = 'productText' + sample;

      chooseProduct(clientCol); 
      chooseProductText(serviceText); 
   }
}

function clearClients()
{  var element1 = document.getElementById('clientCol1');
   element1.style.display = 'none';
   var element2 = document.getElementById('clientCol2');
   element2.style.display = 'none';
}

function chooseProduct(clientCol)
{  clearClients();
   var element = document.getElementById(clientCol);
   element.style.display = 'block';
}

function clearProductText()
{  var element = document.getElementById('productText1-1');
   element.style.display = 'none';
   element = document.getElementById('productText1-2');
   element.style.display = 'none';
   element = document.getElementById('productText1-3');
   element.style.display = 'none';
   element = document.getElementById('productText1-4');
   element.style.display = 'none';
   element = document.getElementById('productText1-5');
   element.style.display = 'none';
   element = document.getElementById('productText1-6');
   element.style.display = 'none';
   element = document.getElementById('productText1-7');
   element.style.display = 'none';
   element = document.getElementById('productText2-1');
   element.style.display = 'none';
   element = document.getElementById('productText2-2');
   element.style.display = 'none';
   element = document.getElementById('productText2-3');
   element.style.display = 'none';
   element = document.getElementById('productText2-4');
   element.style.display = 'none';
   element = document.getElementById('productText2-5');
   element.style.display = 'none';
   element = document.getElementById('productText2-6');
   element.style.display = 'none';
   element = document.getElementById('productText2-7');
   element.style.display = 'none';
}

function chooseProductText(productText)
{  clearProductText();
   var element = document.getElementById(productText);
   element.style.display = 'block';
}