不错的调色板

作者：佚名来源：不详发布时间：2006/10/28 发布人：admin

要完成此效果需要两个步骤

第一步：把如下代码加入到<body>区域中

<FORM ACTION="#" METHOD=post name=setform>
  <table  border="0" cellpadding="0" cellspacing="0" align="left">
    <tr> 
      <td  height="40" bgcolor="#7DB1B5">
        <table border=0 cellpadding=0 cellspacing=0>
          <tr> 
            <td> </td>
            <td  class=color> R: 
              <input type=text name=rd size=3 maxlength=3 onChange="change(form.rd.value,

form.gd.value, form.bd.value);myclip();">
            </td>
          </tr>
          <tr> 
            <td> 
              <input type=text name=bgx size=6 maxlength=6 onChange=xch("bg");>
            </td>
            <td  class=color> G: 
              <input type=text name=gd size=3 maxlength=3 onChange="change(form.rd.value,

form.gd.value, form.bd.value);myclip();">
            </td>
          </tr>
          <tr> 
            <td> </td>
            <td  class=color> B: 
              <input type=text name=bd size=3 maxlength=3 onChange="change(form.rd.value,

form.gd.value, form.bd.value);myclip();">
            </td>
          </tr>
        </table>
      </td>
    </tr>
  </table>
</form>
<Script language=JavaScript><--
var Rc = document.setform.rd;
var Gc = document.setform.gd;
var Bc = document.setform.bd;
//--></Script>
<Script>
var defaultbg="ffffff";

// Dynamic Layer Object
// sophisticated layer/element targeting and animation object which provides the core

functionality needed in most DHTML applications
// 19990326

// Copyright (C) 1999 Dan Steinman
// Distributed under the terms of the GNU Library General Public License
// Available at <a target="_blank" href=http://www.dansteinman.com/dynduo/>http://www.dansteinman.com/dynduo/</a>

// BrowserCheck Object
// provides browser checking variables
var px;
var py;
function BrowserCheck() {
    var b = navigator.appName
    if (b=="Netscape") this.b = "ns"
    else if (b=="Microsoft Internet Explorer") this.b = "ie"
    else this.b = b
    this.version = navigator.appVersion
    this.v = parseInt(this.version)
    this.ns = (this.b=="ns" && this.v>=4)
    this.ns4 = (this.b=="ns" && this.v==4)
    this.ns5 = (this.b=="ns" && this.v==5)
    this.ie = (this.b=="ie" && this.v>=4)
    this.ie4 = (this.version.indexOf('MSIE 4')>0)
    this.ie5 = (this.version.indexOf('MSIE 5')>0)
    this.min = (this.ns||this.ie)
}
is = new BrowserCheck()

// DynLayer Constructor
function DynLayer(id,nestref,frame) {
    if (!DynLayer.set && !frame) DynLayerInit()
    if (is.ns) {
        if (is.ns) {
            if (!frame) {
                if (!nestref) var nestref = DynLayer.nestRefArray[id]
                if (DynLayer.useTest && !DynLayerTest(id,nestref)) return
                this.css = (nestref)? eval("document."+nestref+".document."+id) :

document.layers[id]
            }
            else this.css = (nestref)?

eval("parent."+frame+".document."+nestref+".document."+id) :

parent.frames[frame].document.layers[id]
            this.elm = this.event = this.css
            this.doc = this.css.document
        }
        if (is.ns5) {
            this.elm = document.getElementById(id)
            this.css = this.elm.style
            this.doc = document
        }
        this.x = this.css.left
        this.y = this.css.top
        this.w = this.css.clip.width
        this.h = this.css.clip.height
    }
    else if (is.ie) {
        this.elm = this.event = (frame)? parent.frames[frame].document.all[id] :

document.all[id]
        this.css = (frame)? parent.frames[frame].document.all[id].style :

document.all[id].style
        this.doc = document
        this.x = this.elm.offsetLeft
        this.y = this.elm.offsetTop
        this.w = (is.ie4)? this.css.pixelWidth : this.elm.offsetWidth
        this.h = (is.ie4)? this.css.pixelHeight : this.elm.offsetHeight
    }
    this.id = id

this.obj = id + "DynLayer"
    eval(this.obj + "=this")
    this.moveTo = DynLayerMoveTo
    this.moveBy = DynLayerMoveBy
    this.show = DynLayerShow
    this.hide = DynLayerHide
    this.slideInit = DynLayerSlideInit
    this.clipInit = DynLayerClipInit
    this.write = DynLayerWrite
}

// DynLayer Core Methods (moveTo, moveBy, hide, show)
function DynLayerMoveTo(x,y) {
    if (x!=null) {
        this.x = x
        if (is.ns) this.css.left = this.x
        else this.css.pixelLeft = this.x
    }
    if (y!=null) {
        this.y = y
        if (is.ns) this.css.top = this.y
        else this.css.pixelTop = this.y
    }
}
function DynLayerMoveBy(x,y) {
    this.moveTo(this.x+x,this.y+y)
}
function DynLayerShow() {
    this.css.visibility = (is.ns)? "show" : "visible"
}
function DynLayerHide() {
    this.css.visibility = (is.ns)? "hide" : "hidden"
}

// DynLayer Slide Methods (optional)
// straight line animation methods
function DynLayerSlideInit() {
    this.slideTo = DynLayerSlideTo
    this.slideBy = DynLayerSlideBy
    this.slideStart = DynLayerSlideStart
    this.slide = DynLayerSlide
    this.onSlide = new Function("")
    this.onSlideEnd = new Function("")
}
function DynLayerSlideTo(endx,endy,inc,speed,fn) {
    if (endx==null) endx = this.x
    if (endy==null) endy = this.y
    var distx = endx-this.x
    var disty = endy-this.y
    this.slideStart(endx,endy,distx,disty,inc,speed,fn)
}
function DynLayerSlideBy(distx,disty,inc,speed,fn) {
    var endx = this.x + distx
    var endy = this.y + disty
    this.slideStart(endx,endy,distx,disty,inc,speed,fn)
}
function DynLayerSlideStart(endx,endy,distx,disty,inc,speed,fn) {
    if (this.slideActive) return
    if (!inc) inc = 10
    if (!speed) speed = 20
    var num = Math.sqrt(Math.pow(distx,2) + Math.pow(disty,2))/inc
    if (num==0) return
    var dx = distx/num
    var dy = disty/num
    if (!fn) fn = null
    this.slideActive = true
    this.slide(dx,dy,endx,endy,num,1,speed,fn)
}
function DynLayerSlide(dx,dy,endx,endy,num,i,speed,fn) {
    if (!this.slideActive) return
    if (i++ < num) {
        this.moveBy(dx,dy)
        this.onSlide()
        if (this.slideActive)

setTimeout(this.obj+".slide("+dx+","+dy+","+endx+","+endy+","+num+","+i+","+speed+",\""+fn+"\")",

speed)
        else this.onSlideEnd()
    }
    else {
        this.slideActive = false
        this.moveTo(endx,endy)
        this.onSlide()
        this.onSlideEnd()
        eval(fn)
    }
}

// DynLayer Clip Methods (optional)
// provides layer clipping functionality
function DynLayerClipInit(clipTop,clipRight,clipBottom,clipLeft) {
    this.clipTo = DynLayerClipTo
    this.clipBy = DynLayerClipBy
    this.clipValues = DynLayerClipValues
    if (is.ie) {
        if (arguments.length==4) this.clipTo(clipTop,clipRight,clipBottom,clipLeft)
        else if (is.ie4) this.clipTo(0,this.css.pixelWidth,this.css.pixelHeight,0)
    }
}
function DynLayerClipTo(t,r,b,l) {
    if (t==null) t = this.clipValues('t')
    if (r==null) r = this.clipValues('r')
    if (b==null) b = this.clipValues('b')
    if (l==null) l = this.clipValues('l')
    if (is.ns) {
        this.css.clip.top = t
        this.css.clip.right = r
        this.css.clip.bottom = b
        this.css.clip.left = l
    }
    else if (is.ie) this.css.clip = "rect("+t+"px "+r+"px "+b+"px "+l+"px)"
}
function DynLayerClipBy(t,r,b,l) {

this.clipTo(this.clipValues('t')+t,this.clipValues('r')+r,this.clipValues('b')+b,this.clipValues(

'l')+l)
}
function DynLayerClipValues(which) {
    if (is.ie) var clipv = this.css.clip.split("rect(")[1].split(")")[0].split("px")
    if (which=="t") return (is.ns)? this.css.clip.top : Number(clipv[0])
    if (which=="r") return (is.ns)? this.css.clip.right : Number(clipv[1])
    if (which=="b") return (is.ns)? this.css.clip.bottom : Number(clipv[2])
    if (which=="l") return (is.ns)? this.css.clip.left : Number(clipv[3])
}

// DynLayer Write Method (optional)
// rewrites the contents of the layer
function DynLayerWrite(html) {
    if (is.ns) {
        this.doc.open()
        this.doc.write(html)
        this.doc.close()
    }
    else if (is.ie) {
        this.event.innerHTML = html
    }
}

// DynLayerTest Function (optional - disable with DynLayer.useTest=false)
// makes sure the layer target is correct before assigning the DynLayer, outputs useful info if

incorrect
function DynLayerTest(id,nestref) {
    var ref = new Array()
    if (nestref) ref = nestref.split('.document.')
    ref[ref.length] = id
    var refstr = (is.ns)? 'document.'+ref[0] : 'document.all.'+ref[0]
    for (var i=1; i<=ref.length; i++) {
        if (eval(refstr)) {
            if (ref.length==i) return true
            else refstr += (is.ns)? '.document.'+ref[i] : '.all.'+ref[i]
        }
        else {
            var str ='DynLayer Error:'
            for (j in ref) {
                str += '\n'+ref[j]
                if (j==i-1) str += '  <-- this layer cannot be found'
            }
            if (DynLayerTest.count++<5) alert(str)
            else alert("Too many DynLayer errors, quitting.")
            return false
        }
    }
    return false
}
DynLayerTest.count = 0

// DynLayerInit
// automatically retrieves nested heirarchy of the layer and defines DynLayers named with "Div"
function DynLayerInit(nestref) {
    if (!DynLayer.set) DynLayer.set = true
    if (is.ns) {
        if (nestref) ref = eval('document.'+nestref+'.document')
        else {nestref = ''; ref = document;}
        for (var i=0; i<ref.layers.length; i++) {
            var divname = ref.layers[i].name
            DynLayer.nestRefArray[divname] = nestref
            var index = divname.indexOf("Div")
            if (index > 0) {
                eval(divname.substr(0,index)+' = new

DynLayer("'+divname+'","'+nestref+'")')
            }
            if (ref.layers[i].document.layers.length > 0) {
                DynLayer.refArray[DynLayer.refArray.length] = (nestref=='')?

ref.layers[i].name : nestref+'.document.'+ref.layers[i].name
            }
        }
        if (DynLayer.refArray.i < DynLayer.refArray.length) {
            DynLayerInit(DynLayer.refArray[DynLayer.refArray.i++])
        }
    }
    else if (is.ie) {
        for (var i=0; i<document.all.tags("DIV").length; i++) {
            var divname = document.all.tags("DIV")[i].id
            var index = divname.indexOf("Div")
            if (index > 0) {
                eval(divname.substr(0,index)+' = new DynLayer("'+divname+'")')
            }
        }
    }
    return true
}
DynLayer.nestRefArray = new Array()
DynLayer.refArray = new Array()
DynLayer.refArray.i = 0
DynLayer.set = false
DynLayer.useTest = true

// CSS function (optional)
// returns CSS syntax for generated layers
function css(id,left,top,width,height,color,vis,z,other) {
    if (id=="START") return '<STYLE TYPE="text/css">\n'
    else if (id=="END") return '</STYLE>'
    var str = (left!=null && top!=null)? '#'+id+' {position:absolute; left:'+left+'px;

top:'+top+'px;' : '#'+id+' {position:relative;'
    if (arguments.length>=4 && width!=null) str += ' width:'+width+'px;'
    if (arguments.length>=5 && height!=null) {
        str += ' height:'+height+'px;'
        if (arguments.length<9 || other.indexOf('clip')==-1) str += ' clip:rect(0px

'+width+'px '+height+'px 0px);'
    }
    if (arguments.length>=6 && color!=null) str += (is.ns)? '

layer-background-color:'+color+';' : ' background-color:'+color+';'
    if (arguments.length>=7 && vis!=null) str += ' visibility:'+vis+';'
    if (arguments.length>=8 && z!=null) str += ' z-index:'+z+';'
    if (arguments.length==9 && other!=null) str += ' '+other
    str += '}\n'
    return str
}
function writeCSS(str,showAlert) {
    str = css('START')+str+css('END')
    document.write(str)
    if (showAlert) alert(str)
}

//css(id,left,top,width,height,color,vis,z,other)

if (is.ns){ x=-10; y=-23;}
 else if(is.ie5){ x=-1; y=-42;}
 else {x=0;y=0;}

writeCSS(
 css('bgcDiv',x+10,y+160,53,40,defaultbg,1,8) +

css('RDiv',     x+65,y+160,256,9,null,1,1) +
 css('RpointDiv',x+65,y+169,12,8,null,1,2) +
 css('GDiv',     x+65,y+180,256,9,null,1,3) +
 css('GpointDiv',x+65,y+189,12,8,null,1,4) +
 css('BDiv',     x+65,y+200,256,9,null,1,5) +
 css('BpointDiv',x+65,y+209,12,8,null,1,6)
)

var gcurr;
var Display;

function xch(g) {
document.setform[g + "x"].value = document.setform[g + "x"].value.toUpperCase();
if (g == gcurr) {
    use(g);
}
return true;
}

function initialize(bgc) {
    document.setform.bgx.value = bgc;
    return true;
}

function myclip() {
    var c = h2d(document.setform[gcurr + "x"].value);
    var cr = (c >> 16) & 255, cg = (c >> 8) & 255, cb = (c) & 255;

R.clipTo(null,cr,null,null);
    G.clipTo(null,cg,null,null);
    B.clipTo(null,cb,null,null);

Rpoint.moveTo(R.x-5+cr,null);
    Gpoint.moveTo(G.x-5+cg,null);
    Bpoint.moveTo(B.x-5+cb,null);
}

function use(g) {
    gcurr = g;
    Display = window[gcurr + "c"];
    var c = h2d(document.setform[gcurr + "x"].value);
    var cr = (c >> 16) & 255, cg = (c >> 8) & 255, cb = (c) & 255;
    change(cr, cg, cb);
    myclip();
    return true;
}

function change(r, g, b) {
    document.setform.rd.value = r;
    document.setform.gd.value = g;
    document.setform.bd.value = b;
    document.setform[gcurr + "x"].value = convertToHex(r, g, b);

Display.css.backgroundColor = convertToHex(r, g, b);
    Display.css.bgColor = convertToHex(r, g, b);

return true;
}

function h2d(s)
{
  var r = 0;
  var index = "0123456789ABCDEF";

s = s.toUpperCase();
  for (var i = 0; i < s.length; i++) {
    r <<= 4;
    r += index.indexOf(s.substr(i, 1));
  }
  return r;
}

function convertToHex(R, G, B) {
  var Hex = "0123456789ABCDEF";
  return ""
    + Hex.substr(R >> 4, 1) + Hex.substr(R & 15, 1)
    + Hex.substr(G >> 4, 1) + Hex.substr(G & 15, 1)
    + Hex.substr(B >> 4, 1) + Hex.substr(B & 15, 1);
}

function pcolor(form)
{
  form.bgcolor.value = h2d(form.bgx.value);
  return true;
}

function init() {

DynLayerInit()

initialize(defaultbg);

var c = h2d(document.setform.bgx.value);
    Rc.value = (c >> 16) & 255;
    Gc.value = (c >> 8) & 255;
    Bc.value = (c) & 255;
        defaultRvalue = Rc.value;
        defaultGvalue = Gc.value;
        defaultBvalue = Bc.value;
        
        R.clipInit(0,defaultRvalue,10,0)
        R.dragActive = false
        G.clipInit(0,defaultGvalue,10,0)
        G.dragActive = false
        B.clipInit(0,defaultBvalue,10,0)
        B.dragActive = false

R.clipTo(null,defaultRvalue+1,null,null)
    G.clipTo(null,defaultGvalue+1,null,null)
    B.clipTo(null,defaultBvalue+1,null,null)

Rpoint.moveTo(R.x-5+defaultRvalue,null)
    Gpoint.moveTo(G.x-5+defaultGvalue,null)
    Bpoint.moveTo(B.x-5+defaultBvalue,null)

use("bg");

Display.css.backgroundColor = convertToHex(defaultRvalue, defaultGvalue, defaultBvalue)
    Display.css.bgColor = convertToHex(defaultRvalue, defaultGvalue, defaultBvalue)
        document.onmousedown = mouseDown
        document.onmousemove = mouseMove
        document.onmouseup = mouseUp
        if (is.ns) document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP)
        
}

function mouseDown(e) {
    if ((is.ns && e.which!=1) || (is.ie && event.button!=1)) return true
    var x = (is.ns)? e.pageX : event.x+document.body.scrollLeft
    var y = (is.ns)? e.pageY : event.y+document.body.scrollTop
    if (x>=R.x && x<=R.x+R.w && y>=R.y && y<=R.y+R.h+10) {
        R.clipTo(null,x-R.x,null,null)
        if ( x >= R.x + R.w )
        {
          RpointX = R.w + R.x - 6
          Rc.value  = RpointX + 6 - R.x -1
        }
        else if ( x <= R.x )
        {
          RpointX = R.x - 6
          Rc.value  = RpointX + 6 - R.x
        }
        else
        {
          RpointX = x - 6
          Rc.value  = RpointX + 6 - R.x
        }
        Rpoint.moveTo(RpointX,null)

Display.css.backgroundColor = convertToHex(Rc.value, Gc.value, Bc.value)
        Display.css.bgColor = convertToHex(Rc.value, Gc.value, Bc.value)

R.dragOffsetX = x-R.x
        R.dragOffsetY = y-R.y
        R.dragActive = true
        return false
    }
    else if (x>=G.x && x<=G.x+G.w && y>=G.y && y<=G.y+G.h+10) {
        G.clipTo(null,x-G.x,null,null)
        if ( x >= G.x + G.w )
        {
          GpointX = G.w + G.x - 6
          Gc.value  = GpointX + 6 - G.x -1
        }
        else if ( x <= G.x )
        {
          GpointX = G.x - 6
          Gc.value  = GpointX + 6 - G.x
        }
        else
        {
          GpointX = x - 6
          Gc.value  = GpointX + 6 - G.x
        }
        Gpoint.moveTo(GpointX,null)

Display.css.backgroundColor = convertToHex(Rc.value, Gc.value, Bc.value)
        Display.css.bgColor = convertToHex(Rc.value, Gc.value, Bc.value)

G.dragOffsetX = x-G.x
        G.dragOffsetY = y-G.y
        G.dragActive = true
        return false
    }
    else if (x>=B.x && x<=B.x+B.w && y>=B.y && y<=B.y+B.h+10) {
        B.clipTo(null,x-B.x,null,null)
        if ( x >= B.x + B.w )
        {
          BpointX = B.w + B.x - 6
          Bc.value  = BpointX + 6 - B.x -1
        }
        else if ( x <= B.x )
        {
          BpointX = B.x - 6
          Bc.value  = BpointX + 6 - B.x
        }
        else
        {
          BpointX = x - 6
          Bc.value  = BpointX + 6 - B.x
        }
        Bpoint.moveTo(BpointX,null)

Display.css.backgroundColor = convertToHex(Rc.value, Gc.value, Bc.value)
        Display.css.bgColor = convertToHex(Rc.value, Gc.value, Bc.value)

B.dragOffsetX = x-B.x
        B.dragOffsetY = y-B.y
        B.dragActive = true
        return false
    }
    else return true
}

function mouseMove(e) {
    var x = (is.ns)? e.pageX : event.x+document.body.scrollLeft
    var y = (is.ns)? e.pageY : event.y+document.body.scrollTop
    if (R.dragActive) {
        R.clipTo(null,x-R.x,null,null)
        if ( x >= R.x + R.w )
        {
          RpointX = R.w + R.x - 6
          Rc.value  = RpointX + 6 - R.x -1
        }
        else if ( x <= R.x )
        {
          RpointX = R.x - 6
          Rc.value  = RpointX + 6 - R.x
        }
        else
        {
          RpointX = x - 6
          Rc.value  = RpointX + 6 - R.x
        }
        Rpoint.moveTo(RpointX,null)

Display.css.backgroundColor = convertToHex(Rc.value, Gc.value, Bc.value)
        Display.css.bgColor = convertToHex(Rc.value, Gc.value, Bc.value)
        
        return false
    }
    else if (G.dragActive) {
        G.clipTo(null,x-G.x,null,null)
        if ( x >= G.x + G.w )
        {
          GpointX = G.w + G.x - 6
          Gc.value  = GpointX + 6 - G.x -1
        }
        else if ( x <= G.x )
        {
          GpointX = G.x - 6
          Gc.value  = GpointX + 6 - G.x
        }
        else
        {
          GpointX = x - 6
          Gc.value  = GpointX + 6 - G.x
        }
        Gpoint.moveTo(GpointX,null)

Display.css.backgroundColor = convertToHex(Rc.value, Gc.value, Bc.value)
        Display.css.bgColor = convertToHex(Rc.value, Gc.value, Bc.value)
        return false
    }
    else if (B.dragActive) {
        B.clipTo(null,x-B.x,null,null)
        if ( x >= B.x + B.w )
        {
          BpointX = B.w + B.x - 6
          Bc.value  = BpointX + 6 - B.x -1
        }
        else if ( x <= B.x )
        {
          BpointX = B.x - 6
          Bc.value  = BpointX + 6 - B.x
        }
        else
        {
          BpointX = x - 6
          Bc.value  = BpointX + 6 - B.x
        }
        Bpoint.moveTo(BpointX,null)

Display.css.backgroundColor = convertToHex(Rc.value, Gc.value, Bc.value)
        Display.css.bgColor = convertToHex(Rc.value, Gc.value, Bc.value)
        return false
    }
    else return true
}

function mouseUp(e) {
    var x = (is.ns)? e.pageX : event.x+document.body.scrollLeft
    var y = (is.ns)? e.pageY : event.y+document.body.scrollTop
    R.dragActive = false
    G.dragActive = false
    B.dragActive = false
    change(Rc.value, Gc.value, Bc.value);
    return true
}

</Script>

第二步：把“onload="init();"”加在<body>标记里
例如：<body onload="init();">

特别说明：如网页特效代码中有引用图片文件等，请自己下载到本地调试！

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