JAVASCRIPT

/* DHTML Color Sphere : v1.0.2 : 2008/04/17 */
/* http://www.colorjack.com/software/dhtml+color+sphere.html */

function $(v,o) { return((typeof(o)=='object'?o:document).getElementById(v)); }
function $S(o) { o=$(o); if(o) return(o.style); }
function abPos(o) { var o=(typeof(o)=='object'?o:$(o)), z={X:0,Y:0}; while(o!=null) { z.X+=o.offsetLeft; z.Y+=o.offsetTop; o=o.offsetParent; }; return(z); }
function agent(v) { return(Math.max(navigator.userAgent.toLowerCase().indexOf(v),0)); }
function isset(v) { return((typeof(v)=='undefined' || v.length==0)?false:true); }
function toggle(i,t,xy) { var v=$S(i); v.display=t?t:(v.display=='none'?'block':'none'); if(xy) { v.left=xy[0]; v.top=xy[1]; } }
function XY(e,v) { var o=agent('msie')?{'X':event.clientX+document.documentElement.scrollLeft,'Y':event.clientY+document.documentElement.scrollTop}:{'X':e.pageX,'Y':e.pageY}; return(v?o[v]:o); }
function zero(n) { return(!isNaN(n=parseFloat(n))?n:0); }
function zindex(d) { d.style.zIndex=zINDEX++; }


/* COLOR PICKER */

Picker={};

Picker.stop=1;

Picker.core=function(o,e,xy,z,fu) {

    function point(a,b,e) { eZ=XY(e); commit([eZ.X+a,eZ.Y+b]); }
    function M(v,a,z) { return(Math.max(!isNaN(z)?z:0,!isNaN(a)?Math.min(a,v):v)); }

    function commit(v) { if(fu) fu(v);
    
        if(o=='mCur') { var W=parseInt($S('mSpec').width), W2=W/2, W3=W2/2; 

            var x=v[0]-W2-3, y=W-v[1]-W2+21, SV=Math.sqrt(Math.pow(x,2)+Math.pow(y,2)), hue=Math.atan2(x,y)/(Math.PI*2);

            hsv={'H':hue>0?(hue*360):((hue*360)+360), 'S':SV<W3?(SV/W3)*100:100, 'V':SV>=W3?Math.max(0,1-((SV-W3)/(W2-W3)))*100:100};

            $('mHEX').innerHTML=color.HSV_HEX(hsv); $S('plugID').background='#'+$('mHEX').innerHTML; color.cords(W);

        }
        else if(o=='mSize') { var b=Math.max(Math.max(v[0],v[1])+oH,75); color.cords(b);

            $S('mini').height=(b+28)+'px'; $S('mini').width=(b+20)+'px';
            $S('mSpec').height=b+'px'; $S('mSpec').width=b+'px';

        }
        else {
        
            if(xy) v=[M(v[0],xy[0],xy[2]), M(v[1],xy[1],xy[3])]; // XY LIMIT

            if(!xy || xy[0]) d.left=v[0]+'px'; if(!xy || xy[1]) d.top=v[1]+'px';

        }
    };

    if(Picker.stop) { Picker.stop=''; var d=$S(o), eZ=XY(e); if(!z) zindex($(o));

        if(o=='mCur') { var ab=abPos($(o).parentNode); point(-(ab.X-5),-(ab.Y-28),e); }
        
        if(o=='mSize') { var oH=parseInt($S('mSpec').height), oX=-XY(e).X, oY=-XY(e).Y; }
        
        else { var oX=zero(d.left)-eZ.X, oY=zero(d.top)-eZ.Y; }

        document.onmousemove=function(e){ if(!Picker.stop) point(oX,oY,e); };
        document.onmouseup=function(){ Picker.stop=1; document.onmousemove=''; document.onmouseup=''; };

    }
};

Picker.hsv={H:0, S:0, V:100};

zINDEX=2;


/* COLOR LIBRARY */

color={};

color.cords=function(W) {

    var W2=W/2, rad=(hsv.H/360)*(Math.PI*2), hyp=(hsv.S+(100-hsv.V))/100*(W2/2);

    $S('mCur').left=Math.round(Math.abs(Math.round(Math.sin(rad)*hyp)+W2+3))+'px';
    $S('mCur').top=Math.round(Math.abs(Math.round(Math.cos(rad)*hyp)-W2-21))+'px';

};

color.HEX=function(o) { o=Math.round(Math.min(Math.max(0,o),255));

    return("0123456789ABCDEF".charAt((o-o%16)/16)+"0123456789ABCDEF".charAt(o%16));

};

color.RGB_HEX=function(o) { var fu=color.HEX; return(fu(o.R)+fu(o.G)+fu(o.B)); };

color.HSV_RGB=function(o) {
    
    var R, G, A, B, C, S=o.S/100, V=o.V/100, H=o.H/360;

    if(S>0) { if(H>=1) H=0;

        H=6*H; F=H-Math.floor(H);
        A=Math.round(255*V*(1-S));
        B=Math.round(255*V*(1-(S*F)));
        C=Math.round(255*V*(1-(S*(1-F))));
        V=Math.round(255*V); 

        switch(Math.floor(H)) {

            case 0: R=V; G=C; B=A; break;
            case 1: R=B; G=V; B=A; break;
            case 2: R=A; G=V; B=C; break;
            case 3: R=A; G=B; B=V; break;
            case 4: R=C; G=A; B=V; break;
            case 5: R=V; G=A; B=B; break;

        }

        return({'R':R?R:0, 'G':G?G:0, 'B':B?B:0, 'A':1});

    }
    else return({'R':(V=Math.round(V*255)), 'G':V, 'B':V, 'A':1});

};

color.HSV_HEX=function(o) { return(color.RGB_HEX(color.HSV_RGB(o))); };

CSS

#mini { COLOR: #999; CURSOR: move; FONT-FAMILY: arial, helvetica, san-serif; FONT-SIZE: 11px; POSITION: absolute; background: #000; padding-bottom: 8px; border: 1px solid #111; WIDTH: 148px; HEIGHT: 155px; Z-INDEX: 100; }
#mini div { margin: 0; padding: 0; }
#mini .north { background: #111; border-bottom: 1px solid #171717; }
#mini .north div { color: #999; float: right; padding: 5px 7px; CURSOR: pointer; -moz-user-select: none; -khtml-user-select: none; user-select: none; }
#mini .north div:hover { COLOR: #DE83AD; }
#mini .south { margin: 32px 10px 0 10px; cursor: crosshair; -moz-user-select: none; -khtml-user-select: none; user-select: none; }
#mini .south div { background: url('http://www.colorjack.com/software/media/miniCurr.gif') no-repeat; position: absolute; height: 9px; width: 9px; z-index: 101; }
#mini .south img { height: 100%; WIDTH: 100%; position: relative; TOP: -8px; LEFT: -1px; }
#mini #mHEX { padding: 5px 0 4px 7px; cursor: text; float: left; }
#mini #mHEX:hover { color: #DE83AD }
#mini #mSize { float: right; top: -14px; left: 7px; position: relative; height: 14px; width: 14px; cursor: se-resize }

HTML

<div id="mini" onmousedown="Picker.core('mini',event)">
 <div class="north"><span id="mHEX">FFFFFF</span><div onmousedown="$S('mini').display='none';">X</div></div>
 <div class="south" id="mSpec" style="HEIGHT: 128px; WIDTH: 128px;" onmousedown="Picker.core('mCur',event)">
  <div id="mCur" style="TOP: 86px; LEFT: 68px;"></div>
  <img src="http://www.colorjack.com/software/media/circle.png" onmousedown="return false;" ondrag="return false;" onselectstart="return false;">
  <img src="http://www.colorjack.com/software/media/resize.gif" id="mSize" onmousedown="Picker.core('mSize',event); return false;" ondrag="return false;" onselectstart="return false;">
 </div>
</div>