ns4 = ( document.layers) ? true : false;
ie4 = ( document.all )   ? true : false;

function OnlyEspeciais(e) {
   var whichCode = (window.Event) ? e.which : e.keyCode;
   if (ie4 == true) {
      if (window.event.keyCode == 0 || window.event.keyCode == 8 || window.event.keyCode == 46 || window.event.keyCode == 45 || window.event.keyCode == 95 )
         return true
      else if (window.event.keyCode >= 48 && window.event.keyCode <= 57)
         return true
      else
         if (window.event.keyCode >= 97 && window.event.keyCode <= 122)
            return true
      else
      window.event.keyCode = 0;
      }
   else {
      if (e.which == 0 || e.which == 8 || e.which == 45)
         return true
      else if (e.which >= 48 && e.which <= 57)
         return true
      else
         if (e.which >= 97 && e.which <= 122)
            return true
      else {
         e.preventDefault();
         e.stopPropagation();
         return false;
         }
      }
   }




function validaData(str) {
   dia = (str.value.substring(0,2));
   mes = (str.value.substring(3,5));
   ano = (str.value.substring(6,10));
   cons = true;
   // verifica se foram digitados n??os
   if (isNaN(dia) || isNaN(mes) || isNaN(ano)){
      str.value = "";
      str.focus();
      return false;
      }
   // verifica o dia valido para cada mes
   if ((dia < 01)||(dia < 01 || dia > 30) && (mes == 04 || mes == 06 || mes == 09 || mes == 11 ) || dia > 31) {   cons = false;   }
   // verifica se o mes e valido
   if (mes < 01 || mes > 12 ) {   cons = false;   }
   // verifica se e ano bissexto
   if (mes == 2 && ( dia < 01 || dia > 29 || ( dia > 28 &&(parseInt(ano / 4) != ano / 4)))) {   cons = false;   }
   if (cons == false) {
      document.getElementById('data_erro_vazio').style.display = 'block';
      str.value = "";
      str.focus();
      return false;
      }
   if (cons == true) {
      document.getElementById('data_erro_vazio').style.display = 'none';
      }
   }




// colocar no evento onKeyUp passando o objeto como parametro
function formata(val) {
   var pass = val.value;
   var expr = /[0123456789]/;
   for(i=0; i<pass.length; i++) {
      var lchar = val.value.charAt(i);
      var nchar = val.value.charAt(i+1);
      if(i==0) {
         if ((lchar.search(expr) != 0) || (lchar>3)) {   val.value = "";   }
         }
      else if(i==1) {
         if (lchar.search(expr) != 0) {
            var tst1 = val.value.substring(0,(i));
            val.value = tst1;
            continue;
            }
         if ((nchar != '/') && (nchar != '')) {
            var tst1 = val.value.substring(0, (i)+1);
            if(nchar.search(expr) != 0)
               var tst2 = val.value.substring(i+2, pass.length);
            else
               var tst2 = val.value.substring(i+1, pass.length);
            val.value = tst1 + '/' + tst2;
            }
         }
      else if(i==4){
         if (lchar.search(expr) != 0) {
            var tst1 = val.value.substring(0, (i));
            val.value = tst1;
            continue;
            }
         if ((nchar != '/') && (nchar != '')) {
            var tst1 = val.value.substring(0, (i)+1);
            if(nchar.search(expr) != 0)
               var tst2 = val.value.substring(i+2, pass.length);
            else
               var tst2 = val.value.substring(i+1, pass.length);
            val.value = tst1 + '/' + tst2;
            }
         }
      if (i>=6) {
         if (lchar.search(expr) != 0) {
            var tst1 = val.value.substring(0, (i));
            val.value = tst1;
            }
         }
      }
   if (pass.length>10)
      val.value = val.value.substring(0, 10);
   return true;
   }





// ESCREVE O SITE NA TELA
function modifyText(id, text) {
   if (document.getElementById) {
      obj = document.getElementById(id);
      obj.childNodes[0].data = text;
      }
   }



function left($string,$count) {
$string = substr($string,0,$count);
return $string;
}

function right($string,$count) {
$string = substr($string, -$count, $count);
return $string;
}