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Background Effects >>> Color Table.

JavaScript helps you manipulate the background of the document. Either choose the color you want by its name, or create a unique color by using the "+" and "-" Red, Green, and Blue buttons. A really neat effect.

Variable Background Color Changer

Keep pressing buttons to change color
(The color will start as black)

Step 1: Add the below code to the <BODY> section of your page:

<SCRIPT LANGUAGE="JavaScript">
/* Visit http://www.yaldex.com/ for full source code
and get more free JavaScript, CSS and DHTML scripts! */
<!-- Begin
function changeBackground(hexNumber) {
document.bgColor=hexNumber
}
prefix="#"
rnum1=0
bnum1=0
gnum1=0
rnum2=0
bnum2=0
gnum2=0
hexNumber2="#000000";
rcount=0;
bcount=0;
gcount=0;
function num2hex(num) {
if (num==15) return "f";
else if (num==14) return "e";
else if (num==13) return "d";
else if (num==12) return "c";
else if (num==11) return "b";
else if (num==10) return "a";
else if (num==9) return "9";
else if (num==8) return "8";
else if (num==7) return "7";
else if (num==6) return "6";
else if (num==5) return "5";
else if (num==4) return "4";
else if (num==3) return "3";
else if (num==2) return "2";
else if (num==1) return "1";
else return "0";
}
function changeBackground2(number) {
if(number == 1) {
rnum1=rcount%16;
if (rcount <15) {
rcount=rcount+1;
  }
}
if(number == 2) {
gnum1=gcount%16;
if (gcount <15) {
gcount=gcount+1;
  }
}
if(number == 3) {
bnum1=bcount%16;
if (bcount <15) {
bcount=bcount+1;
  }
}
if(number == 4) {
rnum1=rcount%16;
if (rcount > 0) {
rcount=rcount-1;
  }
}
if(number == 5) {
gnum1=gcount%16;
if (gcount > 0) {
gcount=gcount-1;
  }
}
if(number == 6) {
bnum1=bcount%16;
if (bcount > 0) {
bcount=bcount-1;
  }
 }
hexNumber2 = prefix+num2hex(rnum1)+num2hex(rnum2)+num2hex(gnum1)+num2hex(gnum2)+num2hex(bnum1)+num2hex(bnum2);
  document.bgColor=hexNumber2
}
// End -->
</SCRIPT>
<div align="center">
<FORM METHOD="POST" NAME="background">
<table><tr><td>
<TABLE WIDTH=450 BORDER="3" CELLPADDING="3">
<TR>
<TD Align=center><INPUT TYPE="button" VALUE="Red" ONCLICK="changeBackground('#FF0000')"></TD>
<TD Align=center><INPUT TYPE="button" VALUE="Green" ONCLICK="changeBackground('#00FF00')"></TD>
<TD Align=center><INPUT TYPE="button" VALUE="Blue" ONCLICK="changeBackground('#0000FF')"></TD>
<TD Align=center><INPUT TYPE="button" VALUE="White" ONCLICK="changeBackground('#FFFFFF')"></TD>
<TD Align=center><INPUT TYPE="button" VALUE="Black" ONCLICK="changeBackground('#000000')"></TD>
<TD Align=center><INPUT TYPE="button" VALUE="Grey" ONCLICK="changeBackground('gray')"></TD>
</TR>
</TABLE>
<TABLE WIDTH=450 BORDER="3" CELLPADDING="3">
<TR><TD><center>Variable Background Color Changer</center></TD>
</TR>
</TABLE>
<TABLE WIDTH=450 BORDER="3" CELLPADDING="3">
<TR>
<TD Align=center><INPUT TYPE="button" VALUE="+ Red" ONCLICK="changeBackground2(1)"><P>
<INPUT TYPE="button" VALUE="- Red" ONCLICK="changeBackground2(4)"></TD>
<TD Align=center><INPUT TYPE="button" VALUE="+ Green" ONCLICK="changeBackground2(2)"><P>
<INPUT TYPE="button" VALUE="- Green" ONCLICK="changeBackground2(5)"></TD>
<TD Align=center><INPUT TYPE="button" VALUE="+ Blue" ONCLICK="changeBackground2(3)"><P>
<INPUT TYPE="button" VALUE="- Blue" ONCLICK="changeBackground2(6)"></TD>
</TR>
</TABLE>
<TABLE WIDTH=450 BORDER="3" CELLPADDING="3">
<TR>
<TD><center>Keep pressing buttons to change color<BR>
(The color will start as black)</center></TD>
</TR>
</TABLE>
</td></tr></table>
</FORM>

</div>

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