Mam tak datapicker tylko, że date wyświetla mi w formacie 25/8/2008, a jak zrobić aby wyświetlał ja w takim formacie 2008-08-25? Proszę o pomoc, gdyż z js nic nie kumam.

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// Calendar script
var now = new Date;
var sccm=now.getMonth();
var sccy=now.getFullYear();
var ccm=now.getMonth();
var ccy=now.getFullYear();
 
var updobj;
function lcs(ielem) {
    updobj=ielem;
    getObj('fc').style.left=Left(ielem);
    getObj('fc').style.top=Top(ielem)+ielem.offsetHeight;
    getObj('fc').style.display='';
 
    // First check date is valid
    curdt=ielem.value;
    curdtarr=curdt.split('/');
    isdt=true;
    for(var k=0;k<curdtarr.length;k++) {
        if (isNaN(curdtarr[k]))
            isdt=false;
    }
    if (isdt&(curdtarr.length==3)) {
        ccm=curdtarr[1]-1;
        ccy=curdtarr[2];
        prepcalendar(curdtarr[0],curdtarr[1]-1,curdtarr[2]);
    }
 
}
 
function evtTgt(e)
{
    var el;
    if(e.target)el=e.target;
    else if(e.srcElement)el=e.srcElement;
    if(el.nodeType==3)el=el.parentNode; // defeat Safari bug
    return el;
}
function EvtObj(e){if(!e)e=window.event;return e;}
function cs_over(e) {
    evtTgt(EvtObj(e)).style.background='#FFCC66';
}
function cs_out(e) {
    evtTgt(EvtObj(e)).style.background='#C4D3EA';
}
function cs_click(e) {
    updobj.value=calvalarr[evtTgt(EvtObj(e)).id.substring(1,evtTgt(EvtObj(e)).id.len
th)];
    getObj('fc').style.display='none';
 
}
 
var mn=new Array('JAN','FEB','MAR','APR','MAY','JUN','JUL','AUG','SEP','OCT','NOV','DEC');
var mnn=new Array('31','28','31','30','31','30','31','31','30','31','30','31');
var mnl=new Array('31','29','31','30','31','30','31','31','30','31','30','31');
var calvalarr=new Array(42);
 
function f_cps(obj) {
    obj.style.background='#C4D3EA';
    obj.style.font='10px Arial';
    obj.style.color='#333333';
    obj.style.textAlign='center';
    obj.style.textDecoration='none';
    obj.style.border='1px solid #6487AE';
    obj.style.cursor='pointer';
}
 
function f_cpps(obj) {
    obj.style.background='#C4D3EA';
    obj.style.font='10px Arial';
    obj.style.color='#ABABAB';
    obj.style.textAlign='center';
    obj.style.textDecoration='line-through';
    obj.style.border='1px solid #6487AE';
    obj.style.cursor='default';
}
 
function f_hds(obj) {
    obj.style.background='#FFF799';
    obj.style.font='bold 10px Arial';
    obj.style.color='#333333';
    obj.style.textAlign='center';
    obj.style.border='1px solid #6487AE';
    obj.style.cursor='pointer';
}
 
// day selected
function prepcalendar(hd,cm,cy) {
    now=new Date();
    sd=now.getDate();
    td=new Date();
    td.setDate(1);
    td.setFullYear(cy);
    td.setMonth(cm);
    cd=td.getDay();
    getObj('mns').innerHTML=mn[cm]+ ' ' + cy;
    marr=((cy%4)==0)?mnl:mnn;
    for(var d=1;d<=42;d++) {
        f_cps(getObj('v'+parseInt(d)));
        if ((d >= (cd -(-1))) && (d<=cd-(-marr[cm]))) {
            dip=((d-cd < sd)&&(cm==sccm)&&(cy==sccy));
            htd=((hd!='')&&(d-cd==hd));
            if (dip)
                f_cpps(getObj('v'+parseInt(d)));
            else if (htd)
                f_hds(getObj('v'+parseInt(d)));
            else
                f_cps(getObj('v'+parseInt(d)));
 
            getObj('v'+parseInt(d)).onmouseover=(dip)?null:cs_over;
            getObj('v'+parseInt(d)).onmouseout=(dip)?null:cs_out;
            getObj('v'+parseInt(d)).onclick=(dip)?null:cs_click;
 
            getObj('v'+parseInt(d)).innerHTML=d-cd;    
            calvalarr[d]=''+(d-cd)+'/'+(cm-(-1))+'/'+cy;
        }
        else {
            getObj('v'+d).innerHTML='&nbsp;';
            getObj('v'+parseInt(d)).onmouseover=null;
            getObj('v'+parseInt(d)).onmouseout=null;
            getObj('v'+parseInt(d)).style.cursor='default';
            }
    }
}
 
prepcalendar('',ccm,ccy);
//getObj('fc'+cc).style.visibility='hidden';
 
function caddm() {
    marr=((ccy%4)==0)?mnl:mnn;
 
    ccm+=1;
    if (ccm>=12) {
        ccm=0;
        ccy++;
    }
    cdayf();
    prepcalendar('',ccm,ccy);
}
 
function csubm() {
    marr=((ccy%4)==0)?mnl:mnn;
 
    ccm-=1;
    if (ccm<0) {
        ccm=11;
        ccy--;
    }
    cdayf();
    prepcalendar('',ccm,ccy);
}
 
function cdayf() {
if ((ccy>sccy)|((ccy==sccy)&&(ccm>=sccm)))
    return;
else {
    ccy=sccy;
    ccm=sccm;
    cfd=scfd;
    }
}
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Zamień:

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calvalarr[d]=''+(d-cd)+'/'+(cm-(-1))+'/'+cy;
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na:

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calvalarr[d]=''+(d-cy)+'-'+(cm-(-1))+'-'+cd;
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