function caution() { 
  var x=0;
  var fmg=0;
  var commission=0;
  
  x = document.formulaireCa.capital.value;
  fmg=200+document.formulaireCa.capital.value*0.8/100;
  
  if (x>=60000) {
  	commission=300;
  }
  if ((x>30000) && (x<60000)) {
  	commission=300;
  }
  if (x<=30000) {
  	commission=150;
 }
  
  document.formulaireCa.resultat.value=commission+fmg;
 }