function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}

function errorTransform(fld){
	fld.style.background = '#ae98b2';
}
function noErrorTransform(fld){
	fld.style.background = '#ffffff';
}

function isEmptyField(fld, oblig) {
    var result;
 
    if (fld.value.length == 0) {
		if (oblig) errorTransform(fld);
		else noErrorTransform(fld);
	    result=true;
	} else {
		noErrorTransform(fld);
		result=false;
	}
    return result;  
}


function isEmptyList(lst, oblig) {
    var result;
	var selected=false;
 
	for(i=0;i<lst.options.length;i++){
		if (lst.options[i].selected) selected=true;
	}
    if (!selected && oblig) {
		errorTransform(lst);
	} else {
		noErrorTransform(lst);
	}
    return !selected;  
}


function isEmptyCheckboxList(lst) {
	var selected=0;
	
	for(i=0;i<lst.length;i++){
		if(lst[i].checked){
			selected++;
		}
	}
    return (selected==0);  
}

function isValidPhone(fld){
	var error = "";
	if (isNaN(parseInt(fld.value))) {
		error = "Le téléphone doit contenir uniquement des chiffres.\n";
		errorTransform(fld);
	} else if (!(fld.value.length == 10)) {
		error = "Le téléphone doit contenir 10 chiffres.\n";
		errorTransform(fld);
	} else {
		noErrorTransform(fld);
	}
	return error;
}


function isValidEmail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
		errorTransform(fld);
        error = "L'adresse email n'est pas renseignée.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
		errorTransform(fld);
        error = "L'adresse email n'est pas correcte.\n";
    } else if (fld.value.match(illegalChars)) {
		errorTransform(fld);
        error = "L'adresse email n'est pas correcte.\n";
    } else {
		noErrorTransform(fld);
	}
    return error;
}


function isValidUrl(fld){
  error = "";
  if(fld.value.match(/^(http|https)\:\/\/\w+([\.\-]\w+)*\.\w{2,4}(\:\d+)*([\/\.\-\?\&\%\#]\w+)*\/?$/i)){
	noErrorTransform(fld);
  } else {
	errorTransform(fld);
    error = "L'adresse internet n'est pas correcte.\n";
  }
  return error;
}


function isValidDate(fld){
	if (isDate(fld.value)==false){
		errorTransform(fld);
		return false;
	} else {
		noErrorTransform(fld);
		return true;
	}
 }


function isTime(value){

	var hours=value.charAt(0)+value.charAt(1);
	var minutes=value.charAt(3)+value.charAt(4);


	return (value.length==5 && value.charAt(2)==':' && hours>=0 && hours<=23 && minutes<=59 && minutes>=0);
}




/**
 * 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 isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=dtStr.substring(0,pos1)
	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){
//		alert("The date format should be : dd/mm/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
//		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
//		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
//		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
}