//  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(0,pos1)
	var strDay=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){
		alert("Format de date : mm/jj/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Entrez un mois valide, svp")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Entrez un jour valide, svp")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("SVP, entrez une annee valide comprise entre "+minYear+" et "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Entrez une date valide, svp")
		return false
	}
return true
}

function ValidateDate(theTextBox){
	var dt=theTextBox
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
    return true
}
function ValidateInteger(theTextBox){
	var dt=theTextBox
	if (isInteger(dt.value)==false || dt.value==''){
		alert('Ce champ doit contenir un numero !');
		dt.focus()
		return false
	}
    return true
}
function checkAll(){
if(document.form1.choix.value=="modifier"){
	return (ValidateInteger(document.form1.num_publication) && ValidateDate(document.form1.date_debut) && ValidateDate(document.form1.date_fin));
}else if(document.form1.choix.value=="supprimer"){
	return confirm("Etes vous sur de vouloir supprimer cette publication ?");
}
}

function echangeListes(f,l,s){
var i;
var myName, mySelect, myValue, nouvelleValeur, ancienneValeur, ancienIndex;
var theIndex = l.selectedIndex;
var indexPos=0;
	//1 : determiner l'ancienne valeur
	for(i=0;i<f.elements.length;i++){
		mySelect=f.elements[i];		
		if(mySelect.name == s ){
			indexPos++;
		}
		if(l==mySelect){
			nouvelleValeur=mySelect[mySelect.selectedIndex].value
			ancienneValeur = f.elements['selectedValue_' + indexPos].value;
			f.elements['selectedValue_' + indexPos].value = nouvelleValeur;
		}
	}
	if(l.selectedIndex > 0){
	//2 : retrouver dans le select, l'index de l'ancienne valeur
	for(index=0;index<l.length;index++){
		if(l[index].value==ancienneValeur){
			ancienIndex=index;
		}	
	}
	//3: affecter l'ancienIndex a la liste trouvee
	indexPos=0;
	for(i=0;i<f.elements.length;i++){
		mySelect=f.elements[i];
		myName=mySelect.name;
		if(myName == s){
			indexPos++;
			if(mySelect != l){
				myValue=mySelect[mySelect.selectedIndex].value;
				if(myValue == nouvelleValeur){
					mySelect.selectedIndex = ancienIndex;
					f.elements['selectedValue_' + indexPos].value = ancienneValeur;
				}
			}
		}
		
	}
}
}
function checklist(theForm){
	for(i=0;i<theForm.id_section.length;i++){
		if(theForm.id_section[i][theForm.id_section[i].selectedIndex].value==""){
			for(j=i+1;j<theForm.id_section.length;j++){
				if(theForm.id_section[j][theForm.id_section[j].selectedIndex].value!=""){
					var z = theForm.id_section[i].selectedIndex;
					theForm.id_section[i].selectedIndex=theForm.id_section[j].selectedIndex;
					theForm.id_section[j].selectedIndex=z;
					break;
				}
			}	
		}	
	}
}

function demande_confirmation(theform){
	if(theForm.choix.value="supprimer"){
		return(confirm("Voulez vous vraiment supprimer cette publication ?"));
	}

}


function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    ///alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}