// 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 isDate(dtStr){
	var asd = '';
	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 || dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert("The date format should be : dd/mm/yyyy")
		//return false
		asd = asd + "\nData este de forma: zz/ll/aaaa. "
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		//alert("Please enter a valid day")
		//return false
		asd = asd + "Ziua introdusa nu este corecta. "
	}
	if (strMonth.length<1 || month<1 || month>12){
		//alert("Please enter a valid month")
		//return false
		asd = asd + "Luna introdusa nu este corecta. "
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		//return false
		asd = asd + "Anul trebuie sa fie cuprins intre" + minYear+" si "+maxYear +". "
	}
	//if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert("Please enter a valid date")
		//return false
	//	asd = asd + "Please enter a valid date. "
	//}
return asd
}
function check_email(e) {
		
		ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";

		for(i=0; i < e.length ;i++){
				if(ok.indexOf(e.charAt(i))<0){
						return (false);
				}
		}

		if (document.images) {
		re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
		re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
		if (!e.match(re) && e.match(re_two)) {
				return (-1);
				}
		}
}
function formVerification()
{
	var errorstr = '';
	var b = true;	
		if (document.contact_form.name.value == "" )
		{
			errorstr = errorstr + "\nNumele / prenumele introduse nu sunt corecte";
			b = false;
		}
		var dt = isDate(document.contact_form.date.value);
		if (dt != ""){
			errorstr = errorstr + dt;
			b = false;
		}
		if ( document.contact_form.str.value == "" )
		{
			errorstr = errorstr + "\nStrada introdusa nu este corecta";
			b = false;
		}
		if ( document.contact_form.bl.value == "" )
		{
			errorstr = errorstr + "\nBlocul introdus nu este corect";
			b = false;
		}
		if ( document.contact_form.loc.value == "" )
		{
			errorstr = errorstr + "\nLocalitatea introdusa nu este corecta";
			b = false;
		}
		if ( document.contact_form.jud.value == "" )
		{
			errorstr = errorstr + "\nJudetul/ sectorul introdus nu este corect";
			b = false;
		}
		if ( document.contact_form.cod.value == "" )
		{
			errorstr = errorstr + "\nStrada introdusa nu este corecta";
			b = false;
		}
		if (isInteger(document.contact_form.nr.value) == false)
		{
			errorstr = errorstr + "\nNumarul de telefon introdus nu este corect";
			b = false;
		}
		if ( !check_email(document.contact_form.email.value) )
		{
			errorstr = errorstr + "\nEmail-ul introdus nu este corect";
			b = false;
		}                              
		if ( document.contact_form.curs.value == "" )
		{
			errorstr = errorstr + "\nCursul introdus nu este corect";
			b = false;
		}                                
	if(!b)
	{
	  errorstr = "Exista cateva greseli in formular:\n" + errorstr;
	  alert(errorstr);
	  return false;
	}
	//everything valid, confirm with user
return document.contact_form.submit();
}