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;
}

function MM_validateForm() { //v4.0
  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=MM_findObj(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 numeros entre '+min+' e '+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 == '');
}

(function() {
function $(id) {return document.getElementById(id);}
function goTop(acceleration, time) {
	acceleration = acceleration || 0.1;
	time = time || 16;
	var dx = 0;	var dy = 0;	var bx = 0;	var by = 0;	var wx = 0;	var wy = 0;

	if (document.documentElement) {
		dx = document.documentElement.scrollLeft || 0;
		dy = document.documentElement.scrollTop || 0;
	}
	if (document.body) {
		bx = document.body.scrollLeft || 0;
		by = document.body.scrollTop || 0;
	}
	var wx = window.scrollX || 0;
	var wy = window.scrollY || 0;

	var x = Math.max(wx, Math.max(bx, dx));
	var y = Math.max(wy, Math.max(by, dy));

	var speed = 1 + acceleration;
	window.scrollTo(Math.floor(x / speed), Math.floor(y / speed));
	if(x > 0 || y > 0) {
		var invokeFunction = "MGJS.goTop(" + acceleration + ", " + time + ")"
		window.setTimeout(invokeFunction, time);
	}
}
window['MGJS'] = {};
window['MGJS']['$'] = $;
window['MGJS']['goTop'] = goTop;
})();