var col_erros = "";

function validateNumber(id, caption, required) {
	no = document.getElementById(id);
 	if (!no) return;
	
 	if (("" + parseInt(no.value)) == no.value) {
    	return true;
	} 
	else {
		if (required) {
		    col_erros += "\n - O campo " + caption + " é de preenchimento obrigatório!";
		    return false;
		}
	}
	return true;
}

//TODO: IMPLEMENTAR VERIFICACAO DE SEPARADOR DECIMAL
function validateCurrency(id, caption, required) {
	no = document.getElementById(id);
 	if (!no) return;
	
 	if (("" + parseInt(no.value)) == no.value) {
    	return true;
	} 
	else {
		if (required) {
		    col_erros += "\n - O campo " + caption + " é de preenchimento obrigatório!";
		    return false;
		}
	}
	return true;
}

function validateText(id, caption, required)
{
  var str = document.getElementById(id).value;
  if (!required && str.length == 0)
    return true;
  
  if (str.length == 0) {
	col_erros += "\n - O campo " + caption + " é de preenchimento obrigatório!";
    return false;
  }
  return true;
}

function validateSelect(id, caption, required)
{
	val = 0;
  try
    {
      var e = document.getElementById(id);
      var text = e.options.item(e.selectedIndex).text;
			if(text=='')
				val = -1;
    }
  catch(ex)
    {
      return true;
    }
  if (!required && val == -1)
    return true;
  if (val == -1) {
		col_erros += "\n - O campo " + caption + " é de preenchimento obrigatório!";
    return false;
  }
  
  return true;
}

function validateEmail(id, caption, required)
{
  var str = document.getElementById(id).value;
  if (!required && str.length == 0)
    return true;
  
  if (str.length < 1) {
	col_erros += "\n - O campo " + caption + " é de preenchimento obrigatório!";
    return false;
  }
  else if (str.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != 0) {
	col_erros += "\n - O campo " + caption + " está preenchido com um valor incorrecto!";
    return false;
  }
  
  return true;
}

/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31;
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30;}
		if (i==2) {this[i] = 29;}
   } 
   return this
}

function validateDate(id, caption, required){
	var dtStr = document.getElementById(id).value;
	if(dtStr=="" && !required)
		return true;
	
	var daysInMonth = DaysArray(12);
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strDay=dtStr.substring(0,pos1);
	var strMonth=dtStr.substring(pos1+1,pos2);
	var strYear=dtStr.substring(pos2+1);
	strYr=strYear;
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1);
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1);
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1);
	}
	month=parseInt(strMonth);
	day=parseInt(strDay);
	year=parseInt(strYr);
	if (pos1==-1 || pos2==-1){
		col_erros += "\n - O campo " + caption + " está preenchido com um valor incorrecto! Deve ser dd/mm/aaaa";
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		col_erros += "\n - O campo " + caption + " está preenchido com um valor incorrecto! O dia não é válido";
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		col_erros += "\n - O campo " + caption + " está preenchido com um valor incorrecto! O mês não é válido";
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		col_erros += "\n - O campo " + caption + " está preenchido com um valor incorrecto! O ano não é válido";
//		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date");
		return false;
	}
	return true;
}

function trimAllSpaces(sString) {
  while (sString.substring(0,1) == ' ')   {
    sString = sString.substring(1, sString.length);
  }
  while (sString.substring(sString.length-1, sString.length) == ' ') {
    sString = sString.substring(0,sString.length-1);
  }
  return sString;
}

function trimSpaces(what) {
  what.value = trimAllSpaces(what.value);
}