function MM_validateForm() {
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name; if ((val=val.value)!="") {
        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
          if (p<1 || p==(val.length-1)) errors+='- '+nm+' deve conter um e-mail.\n';
        } else if (test!='R') { num = parseFloat(val);
          if (isNaN(val)) errors+='- '+nm+' deve conter números.\n';
          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
            min=test.substring(8,p); max=test.substring(p+1);
            if (num<min || max<num) errors+='- '+nm+' deve conter números entre '+min+' and '+max+'.\n';
      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' (requerido).\n'; }
    } if (errors) alert('Ocorreram os seguintes erro(s):\n\n'+errors);
    document.MM_returnValue = (errors == '');
} }

NumeroCampo = 0;
function Add() {
    if(NumeroCampo < 4) {
        NumeroCampo++;
        data = "<span id='campo"+NumeroCampo+"'><input type=\"file\" name=\"file[]\" /> <input type=\"button\" value=\"Remover\" onclick=\"Delcampo('campo"+NumeroCampo+"')\" /></span>";
        campo = document.getElementById("campos");
        campo.innerHTML = campo.innerHTML + data;
    }    
}

function Delcampo(IDDiv) {
    var d = document.getElementById('campos');
    var olddiv = document.getElementById(IDDiv);
    d.removeChild(olddiv);
    NumeroCampo--;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}