色彩调节器

发布时间:2007年02月01日      浏览次数:1372 次
1.将下面的代码复制到 <body>内
<style>.drag {
CURSOR: hand; POSITION: relative
}
</style>
<script language=JavaScript1.2>
// Slider script by Ronald H. Jankowsky (http://rj-edv-beratung.de), parts of
code (draglayer, movelayer) by DynamicDrive.com
// This script is free for use, please leave this notice intact
var sPosition;
var showPerc=100;
document.onmousedown=dragLayer
document.onmouseup=new Function("dragMe=false")
var Color= new Array();
Color[0] = "00";
Color[1] = "11";
Color[2] = "22";
Color[3] = "33";
Color[4] = "44";
Color[5] = "55";
Color[6] = "66";
Color[7] = "77";
Color[8] = "88";
Color[9] = "99";
Color[10] = "AA";
Color[11] = "BB";
Color[12] = "CC";
Color[13] = "DD";
Color[14] = "EE";
Color[15] = "FF";
// Demofunction to change bg-color by moving slider
var rVal,gVal,bVal, cCol
function chgBg() {
cCol = document.bgColor; rVal=cCol.substr(1,2); gVal=cCol.substr(3,2); bVal=cCol.substr(5,2);
ind = Math.round(showPerc/16); if (ind < 0) ind = 0; if (ind > 15) ind=15;
// If more sliders are used, each of them has to be handled separately
if (kObj.id =="knobImg") document.bgColor="#"+Color[ind]+gVal+bVal;
if (kObj.id =="knobImg1") document.bgColor="#"+rVal+Color[ind]+bVal;
if (kObj.id =="knobImg2") document.bgColor="#"+rVal+gVal+Color[ind];
}
// Drag and move engine (original code by DynamicDrive.com), don't change unless
explicitely indicated
var dragMe=false, kObj, yPos,direction
function moveLayer() {
if (event.button==1 && dragMe) {
oldY = kObj.style.pixelTop; kObj.style.pixelTop=temp2+event.clientY-yPos;
// Limit movement of knob to stay inside layer
if (kObj.style.pixelTop > oldY) direction="dn"; else direction="up";
if (kObj.style.pixelTop < 2 && direction=="up") {kObj.style.pixelTop=2;
direction="dn";}
if (kObj.style.pixelTop > 102 && direction=="dn") {kObj.style.pixelTop=102;
direction="up";}
// Set working variable 'showPerc' depending on 100 or 250 scaling
sPosition=kObj.style.pixelTop; showPerc = (perCent[0].checked) ? sPosition-2
: (sPosition-2)/2*5;
// The following line should be replaced by the function-call with the actual
task to perform
chgBg();
return false; }
}
function dragLayer() {
if (!document.all) return;
if (event.srcElement.className=="drag") {dragMe=true; kObj=event.srcElement;
temp2=kObj.style.pixelTop; yPos=event.clientY; document.onmousemove=moveLayer;
}
}
</script>
提示:这是一个颜色的调节器,现在本例子只简单的改变了背景的颜色,你完全可以将这使用方法应用到如聊天室的字体颜色等程序上,可以让你的应用增添色彩.</p>
<div id=outerLyr
style="Z-INDEX: 1; LEFT: 233px; WIDTH: 23px; POSITION: absolute; TOP: 111px;
HEIGHT: 120px; BACKGROUND-COLOR: #000000"><img
class=drag id=knobImg
style="Z-INDEX: 3; LEFT: 2px; WIDTH: 20px; TOP: 100px; HEIGHT: 17px"

src="../tempimgs/js/knob.jpeg">
<div id=innerLyr
style="Z-INDEX: 2; LEFT: 2px; WIDTH: 20px; POSITION: absolute; TOP: 2px;
HEIGHT: 117px; BACKGROUND-COLOR: #777777">
<div id=barLyr
style="Z-INDEX: 1; LEFT: 9px; WIDTH: 2px; POSITION: absolute; TOP: 5px;
HEIGHT: 110px; BACKGROUND-COLOR: #000000"></div>
</div>
</div>
<div id=outerLyr1
style="Z-INDEX: 1; LEFT: 268px; WIDTH: 23px; POSITION: absolute; TOP: 111px;
HEIGHT: 120px; BACKGROUND-COLOR: #000000"><img
class=drag id=knobImg1
style="Z-INDEX: 3; LEFT: 2px; WIDTH: 20px; TOP: 100px; HEIGHT: 17px"

src="../tempimgs/js/knob.jpeg">
<div id=innerLyr1
style="Z-INDEX: 2; LEFT: 2px; WIDTH: 20px; POSITION: absolute; TOP: 2px;
HEIGHT: 117px; BACKGROUND-COLOR: #777777">
<div id=barLyr1
style="Z-INDEX: 1; LEFT: 9px; WIDTH: 2px; POSITION: absolute; TOP: 5px;
HEIGHT: 110px; BACKGROUND-COLOR: #000000"></div>
</div>
</div>
<div id=outerLyr2
style="Z-INDEX: 1; LEFT: 300px; WIDTH: 23px; POSITION: absolute; TOP: 111px;
HEIGHT: 120px; BACKGROUND-COLOR: #000000"><img
class=drag id=knobImg2
style="Z-INDEX: 3; LEFT: 2px; WIDTH: 20px; TOP: 100px; HEIGHT: 17px"

src="../tempimgs/js/knob.jpeg">
<div id=innerLyr2
style="Z-INDEX: 2; LEFT: 2px; WIDTH: 20px; POSITION: absolute; TOP: 2px;
HEIGHT: 117px; BACKGROUND-COLOR: #777777">
<div id=barLyr2
style="Z-INDEX: 1; LEFT: 9px; WIDTH: 2px; POSITION: absolute; TOP: 5px;
HEIGHT: 110px; BACKGROUND-COLOR: #000000"></div>
</div>
<!-- This would be a way to configure if slider range is 0-100 or 0-255 -->
</div>
<p>
<input
type=radio value=false name=perCent>
Prozent
<input type=radio CHECKED value=true
name=perCent>
255
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