js色彩选择怎么实现-JavaSript-爱易网页

js色彩选择怎么实现

日期：2014-05-16　浏览次数：20471 次

js色彩选择如何实现
js色彩选择如何实现

------解决方案--------------------

HTML code



<HTML><HEAD><TITLE>颜色</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<STYLE type=text/css>TD {
    FONT-SIZE: 10.8pt
}
BODY {
    FONT-SIZE: 10.8pt
}
BUTTON {
    WIDTH: 5em
}
</STYLE>

<SCRIPT language=JavaScript>
var SelRGB = '';
var DrRGB = '';
var SelGRAY = '120';

var hexch = new Array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F');

function ToHex(n)
{    var h, l;

    n = Math.round(n);
    l = n % 16;
    h = Math.floor((n / 16)) % 16;
    return (hexch[h] + hexch[l]);
}

function DoColor(c, l)
{ var r, g, b;

  r = '0x' + c.substring(1, 3);
  g = '0x' + c.substring(3, 5);
  b = '0x' + c.substring(5, 7);
  
  if(l > 120)
  {
    l = l - 120;

    r = (r * (120 - l) + 255 * l) / 120;
    g = (g * (120 - l) + 255 * l) / 120;
    b = (b * (120 - l) + 255 * l) / 120;
  }else
  {
    r = (r * l) / 120;
    g = (g * l) / 120;
    b = (b * l) / 120;
  }

  return '#' + ToHex(r) + ToHex(g) + ToHex(b);
}

function EndColor()
{ var i;

  if(DrRGB != SelRGB)
  {
    DrRGB = SelRGB;
    for(i = 0; i <= 30; i ++)
      GrayTable.rows(i).bgColor = DoColor(SelRGB, 240 - i * 8);
  }

  SelColor.value = DoColor(RGB.innerText, GRAY.innerText);
  ShowColor.bgColor = SelColor.value;
}
</SCRIPT>

<SCRIPT language=JavaScript event=onclick for=ColorTable>
  SelRGB = event.srcElement.bgColor;
  EndColor();
</SCRIPT>

<SCRIPT language=JavaScript event=onmouseover for=ColorTable>
  RGB.innerText = event.srcElement.bgColor;
  EndColor();
</SCRIPT>

<SCRIPT language=JavaScript event=onmouseout for=ColorTable>
  RGB.innerText = SelRGB;
  EndColor();
</SCRIPT>

<SCRIPT language=JavaScript event=onclick for=GrayTable>
  SelGRAY = event.srcElement.title;
  EndColor();
</SCRIPT>

<SCRIPT language=JavaScript event=onmouseover for=GrayTable>
  GRAY.innerText = event.srcElement.title;
  EndColor();
</SCRIPT>

<SCRIPT language=JavaScript event=onmouseout for=GrayTable>
  GRAY.innerText = SelGRAY;
  EndColor();
</SCRIPT>

<SCRIPT language=JavaScript event=onclick for=Ok>
  window.returnValue = SelColor.value;
  window.close();
</SCRIPT>

<META content="MSHTML 6.00.2600.0" name=GENERATOR></HEAD>
<BODY bgColor=menu>
<DIV align=center>
<CENTER>
<TABLE cellSpacing=10 cellPadding=0 border=0>
  <TBODY>
  <TR>
    <TD>
      <TABLE id=ColorTable style="CURSOR: hand" cellSpacing=0 cellPadding=0 
      border=0>
        <SCRIPT language=JavaScript>
function wc(r, g, b, n)
{
    r = ((r * 16 + r) * 3 * (15 - n) + 0x80 * n) / 15;
    g = ((g * 16 + g) * 3 * (15 - n) + 0x80 * n) / 15;
    b = ((b * 16 + b) * 3 * (15 - n) + 0x80 * n) / 15;

    document.write('<TD BGCOLOR=#' + ToHex(r) + ToHex(g) + ToHex(b) + ' height=8 width=8></TD>');
}

var cnum = new Array(1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0);

  for(i = 0; i < 16; i ++)
  {
     document.write('<TR>');
     for(j = 0; j < 30; j ++)
     {
         n1 = j % 5;
         n2 = Math.floor(j / 5) * 3;
         n3 = n2 + 3;

         wc((cnum[n3] * n1 + cnum[n2] * (5 - n1)),
             (cnum[n3 + 1] * n1 + cnum[n2 + 1] * (5 - n1)),
             (cnum[n3 + 2] * n1 + cnum[n2 + 2] * (5 - n1)), i);
     }

     document.writeln('</TR>');
  }
</SCRIPT>

        <TBODY></TBODY></TABLE></TD>
    <TD>
      <TABLE id=GrayTable style="CURSOR: hand" cellSpacing=0 cellPadding=0 
      border=0>
        <SCRIPT language=JavaScript>
  for(i = 255; i >= 0; i -= 8.5)
     document.write('<TR BGCOLOR=#' + ToHex(i) + ToHex(i) + ToHex(i) + '><TD TITLE=' + Math.floor(i * 16 / 17) + ' he

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