📄 ch14-211.txt
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<HTML>
<HEAD>
<TITLE>页面背景篇--调色板</TITLE>
</HEAD>
<BODY bgcolor="#fef4d2" >
<br><br>
<center>
<font color="ffaafa"><h2>页面背景篇--调色板</h2></font>
<hr width=300>
<br>
<!-- 案例代码开始 -->
<script language=JavaScript>
var indexcolor = new Array(6)
indexcolor[0] = "00"
indexcolor[1] = "33"
indexcolor[2] = "66"
indexcolor[3] = "99"
indexcolor[4] = "CC"
indexcolor[5] = "FF"
function DrawBGColorCube() {
document.write('<TABLE CELLPADDING=3 CELLSPACING=0 BORDER=2><TR>')
for (var i = 0; i < 3; ++i) {
document.write('<td bgcolor="#ccffcc">')
DrawBGColorTable(indexcolor[i])
document.write('</TD>') }
document.write('</TR></TABLE>')
}
function DrawBGColorTable(blue) {
document.write('<TABLE CELLPADDING=0 CELLSPACING=0 BORDER=0>')
for (var i = 0; i < 5; ++i) { DrawBGColorRow(indexcolor[i], blue) }
document.write('</TABLE>')
}
function DrawBGColorRow(red, blue) {
document.write('<TR>')
for (var i = 0; i < 5; ++i) { DrawBGColorCell(red, indexcolor[i], blue) }
document.write('</TR>')
}
function DrawBGColorCell(red, green, blue) {
document.write('<TD BGCOLOR="#' + red + green + blue + '">')
document.write('<A HREF="javascript:DisplayColor(\'' + (red + green + blue) + '\')">')
document.write('<IMG SRC="place.gif" BORDER=1 HEIGHT=12 WIDTH=12>')
document.write('</A>')
document.write('</TD>')
}
function DisplayColor(triplet) {
document.bgColor = '#' + triplet
}
DrawBGColorCube()
</script>
<!-- 案例代码结束 -->
</BODY>
</HTML>
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