var min=8;
var max=18;
function increaseFontSize() {
   var p = document.getElementsByClassName('f12');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=max) {
         s += 1;
      }
      p[i].style.fontSize = s+"px"
   }
}
function decreaseFontSize() {
   var p = document.getElementsByClassName('f12');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=min) {
         s -= 1;
      }
      p[i].style.fontSize = s+"px"
   }   
}

function switchCSS() {
  if(document.getElementById('css').href == 'img/cms/guest/style_contrast.css')
  {
    document.getElementById('css').href = 'img/cms/guest/style_color.css';
  }
  else 
  {
    document.getElementById('css').href = 'img/cms/guest/style_contrast.css';
  } 
}

function printCSS() 
{
    document.getElementById('css').href = 'img/cms/guest/style_print.css';
    window.print();
}