function clearText(thefield){
   if (thefield.defaultValue == thefield.value)
      thefield.value = ""
   else
      thefield.value = thefield.defaultValue
}

var min=8;
var max=18;
function increaseFontSize() {
   var p = document.getElementById('content');
      if(p.style.fontSize) {
         var s = parseInt(p.style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=max) {
         if (s == min) {
            document.getElementById('resizer_minus').src = '/fileadmin/template/images/tcc_minus_a.gif';
         }
         s += 1;
         if (s == max) {
            document.getElementById('resizer_plus').src = '/fileadmin/template/images/tcc_plus_i.gif';
         }
      }
      p.style.fontSize = s+"px"
}
function decreaseFontSize() {
   var p = document.getElementById('content');
      if(p.style.fontSize) {
         var s = parseInt(p.style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=min) {
         if (s == max) {
            document.getElementById('resizer_plus').src = '/fileadmin/template/images/tcc_plus_a.gif';
         }
         s -= 1;
         if (s == min) {
            document.getElementById('resizer_minus').src = '/fileadmin/template/images/tcc_minus_i.gif';
         }
      }
      p.style.fontSize = s+"px"
}