detecter automatiquement le Daylight saving time(dst)

[developer5]

Bonjour,

je developpe un site intranet .sur mon site ja affiché l'heure(evolue pas statique) de plusieurs pays(france,uk,boston,london...).pour faire ça j'ai utilisé un script javascript dont le code

Code :

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 				<script type="text/javascript">
	var listHtmlElem = [];
	//listHtmlElem.push([$(DIV_ID),GMT]);
	listHtmlElem.push([$('LD'),+1]);
	listHtmlElem.push([$('Bos-Mer'),-4]);
	listHtmlElem.push([$('Dallas'),-5]);
	listHtmlElem.push([$('Loc'),+2]);
	listHtmlElem.push([$('Bangalore'),+7]);
 
	 function $(id){
	return document.getElementById(id);
		}
 
	 function displayTime(HtmlElem,gmt){
	var date = new Date();
	var utc = gmt;
	var Hour;
 
	utc *= 60; // minutes
	utc += date.getTimezoneOffset(); // correction local -> gmt
	utc *= 60000; // millisecondes
	Hour=new Date(date.getTime() + utc).toUTCString().replace('UTC','').split(' ');
	HtmlElem.innerHTML = Hour[4];
		}
 
	 function updateTime(){
 
	for(var i in listHtmlElem)
 
		displayTime(listHtmlElem[i][0],listHtmlElem[i][1]);
		}
	setInterval(updateTime,1000);
 
</script>

je veux qu'on detecte automatiquement le Daylight saving time (dst) (ajout ou soustraction d'une heure ou plus dans certains pays).
peut on changer le code pour faire ça ?
merci d'avance.

[developer5]

s'il vous plait si qq a une ideé comment tenir compte du le Daylight saving time utilisant javascript peut -il- m'aider .
merci

[nadox]

Bonsoir,

http://www.google.com/search?q=detec...ith+javascript

1er résultat : http://www.michaelapproved.com/artic...me-dst-detect/

[developer5]

Bonjour,
je vous remerci pour ton aide.j'ai ajouter les deux fonctions dans un meme script mais malheureusement ça marche pas?

[nadox]

Quelle est la question ? Ça marche pas ? Je ne peux pas deviner le code que tu as sous les yeux...

[developer5]

desolé mais je parle des fonctios situé dans le lien que vous m'avez envoyé
voici le code

Code :

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<script>
 
function TimezoneDetect(){ 
    var dtDate = new Date('1/1/' + (new Date()).getUTCFullYear()); 
    var intOffset = 10000; //set initial offset high so it is adjusted on the first attempt 
    var intMonth; 
    var intHoursUtc; 
    var intHours; 
    var intDaysMultiplyBy; 
 
    //go through each month to find the lowest offset to account for DST 
    for (intMonth=0;intMonth < 12;intMonth++){ 
        //go to the next month 
        dtDate.setUTCMonth(dtDate.getUTCMonth() + 1); 
 
        //To ignore daylight saving time look for the lowest offset. 
        //Since, during DST, the clock moves forward, it'll be a bigger number. 
        if (intOffset > (dtDate.getTimezoneOffset() * (-1))){ 
            intOffset = (dtDate.getTimezoneOffset() * (-1)); 
        } 
    } 
 
    return intOffset; 
}
 
//Find start and end of DST 
function DstDetect(){ 
    var dtDstDetect = new Date(); 
    var dtDstStart = ''; 
    var dtDstEnd = ''; 
    var dtDstStartHold = ''; //Temp date hold 
    var intYearDayCount = 732; //366 (include leap year) * 2 (for two years) 
    var intHourOfYear = 1; 
    var intDayOfYear; 
    var intOffset = TimezoneDetect(); //Custom function. Make sure you include it. 
 
    //Start from a year ago to make sure we include any previously starting DST 
    dtDstDetect = new Date() 
    dtDstDetect.setUTCFullYear(dtDstDetect.getUTCFullYear() - 1); 
    dtDstDetect.setUTCHours(0,0,0,0); 
 
    //Going hour by hour through the year will detect DST with shorter code but that could result in 8760 
    //FOR loops and several seconds of script execution time. Longer code narrows this down a little. 
    //Go one day at a time and find out approx time of DST and if there even is DST on this computer. 
    //Also need to make sure we catch the most current start and end cycle. 
    for(intDayOfYear = 1; intDayOfYear <= intYearDayCount; intDayOfYear++){ 
        dtDstDetect.setUTCDate(dtDstDetect.getUTCDate() + 1); 
 
        if ((dtDstDetect.getTimezoneOffset() * (-1)) != intOffset && dtDstStartHold == ''){ 
            dtDstStartHold = new Date(dtDstDetect); 
        } 
        if ((dtDstDetect.getTimezoneOffset() * (-1)) == intOffset && dtDstStartHold != ''){ 
            dtDstStart = new Date(dtDstStartHold); 
            dtDstEnd = new Date(dtDstDetect); 
            dtDstStartHold = ''; 
 
            //DST is being used in this timezone. Narrow the time down to the exact hour the change happens 
            //Remove 48 hours (a few extra to be on safe side) from the start/end date and find the exact change point 
            //Go hour by hour until a change in the timezone offset is detected. 
            dtDstStart.setUTCHours(dtDstStart.getUTCHours() - 48); 
            dtDstEnd.setUTCHours(dtDstEnd.getUTCHours() - 48); 
 
            //First find when DST starts 
            for(intHourOfYear=1; intHourOfYear <= 48; intHourOfYear++){ 
                dtDstStart.setUTCHours(dtDstStart.getUTCHours() + 1); 
 
                //If we found it then exit the loop. dtDstStart will have the correct value left in it. 
                if ((dtDstStart.getTimezoneOffset() * (-1)) != intOffset){ 
                    break; 
                } 
            } 
 
            //Now find out when DST ends 
            for(intHourOfYear=1; intHourOfYear <= 48; intHourOfYear++){ 
                dtDstEnd.setUTCHours(dtDstEnd.getUTCHours() + 1); 
 
                //If we found it then exit the loop. dtDstEnd will have the correct value left in it. 
                if ((dtDstEnd.getTimezoneOffset() * (-1)) != (intOffset + 60)){ 
                    break; 
                } 
            } 
 
            //Check if DST is currently on for this time frame. If it is then return these values. 
            //If not then keep going. The function will either return the last values collected 
            //or another value that is currently in effect 
            if ((new Date()).getTime() >= dtDstStart.getTime() && (new Date()).getTime() <= dtDstEnd.getTime()){ 
                return new Array(dtDstStart,dtDstEnd); 
            } 
 
        } 
    } 
    return new Array(dtDstStart,dtDstEnd); 
}
</script>

[nadox]

A quel endroit tu utilise le code ? Comment ? Il ne suffit pas de copier/coller le script, il faut aussi l'utiliser (dans ton code) !

[developer5]

je l'ai mis dans le body

[nadox]

Tu as mis quoi dans le body ? Juste le code des fonctions ? Ben il ne va pas faire ce que tu veux comme par magie !

Il faut modifier ton premier code pour qu'il utilise les fonctions. Si tu ne sais pas faire ça, il faut peut-être commencer par apprendre javascript !