<!--

 function isnumber(formu){
       if(formu.value.length==0){
	      alert("Digite os dados solicitados!");
	      formu.focus();
              return false;
      }
         RefString="1234567890,.-";
         for (Count=0; Count < formu.value.length; Count++){
         TempChar= formu.value.substring (Count, Count+1);
         if (RefString.indexOf (TempChar, 0)==-1) {
	      alert("Digite apenas números !");
	      formu.focus();
              return false;
          }
           }
   return true;
  }

//-->