/**
 * DHTML date validation script for dd/mm/yyyy. 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 ValidaEmail(mail){
   var ret = false;
   if (typeof(mail) != "undefined"){
      mail = mail.match(/(\w+)@(.+)\.(\w+)$/);
      if (mail != null){
         if ((mail[3].length==2) || (mail[3].length==3))
            ret = true;
         }
      }
   return ret;
}


function DataValida(data)
{
    var err=0

    if (data.length != 8) return false;

    day = data.substring(0,2);
    month = data.substring(3,2);
    year = data.substring(5,2);


    	if (month<1 || month>12) err = 1;
    	if (day<1 || day>31) err = 1;
    	if (day==31 && (month==4 || month==6 || month==9 || month==11)) err=1;

    	if (month==2)
        {
    		if ((year%4==0) && (year%100!=0 || year%400==0))
            {
    			if (day>29) err=1;
    		}
            else
            {
    			if (day>28) err=1;
    	    }
        }
        if (day == "" || month == "" || year == "") err=1;
	   if (err==1)
       {
		  return false;
	   }


    return true;
}

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 isDate(dtStr){


	if (dtStr.length == 0) return true;
	if (dtStr.length != 8) return false;

	// transforma: 'dd/mm/yy' em 'dd/mm/yyyy' ----01/34/67
	dtStr = dtStr.substr(0,6)+'20'+dtStr.substr(6,2)

	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) return false;
	if (strMonth.length<1 || month<1 || month>12) return false;
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]) return false;
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear) return false;
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false) return false;

return true
}

function ComparaDatas(dtStr1,dtStr2){
//returna false de dt1 > dt2

	//transforma em string no formato yymmdd para poder comparar diretamente
	dt1 = dtStr1.substr(6,2)+ dtStr1.substr(3,2) + dtStr1.substr(0,2);
	dt2 = dtStr2.substr(6,2)+ dtStr2.substr(3,2) + dtStr2.substr(0,2);

	if (dt1>dt2)
           return false;
        else
	   return true;
}