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  1. #1
    Junior Member
    elliottedgar87 is offline

    Posts
    0

    Some more cool javascript...

    Here is a nice script that makes a webpage background flash different colours. Just put it in the head section apart from the last bit.
    Code:
    <!--Put this in your head section-->
    <script language="JavaScript">
    <!--
    
    r=135;
    g=235;
    b=005;
    flag=0;
    t=new Array;
    
    o=new Array;
    
    d=new Array;
    
    function hex(a,c)
    {
    t[a]=Math.floor(c/16)
    o[a]=c%16
    switch (t[a])
    {
    case 10:
    t[a]='A';
    break;
    case 11:
    t[a]='B';
    break;
    case 12:
    t[a]='C';
    break;
    case 13:
    t[a]='D';
    break;
    case 14:
    t[a]='E';
    break;
    case 15:
    t[a]='F';
    break;
    default:
    break;
    }
    switch (o[a])
    {
    case 10:
    o[a]='A';
    break;
    case 11:
    o[a]='B';
    break;
    case 12:
    o[a]='C';
    break;
    case 13:
    o[a]='D';
    break;
    case 14:
    o[a]='E';
    break;
    case 15:
    o[a]='F';
    break;
    default:
    break;
    }
    }
    
    function ran(a,c)
    {
    if ((Math.random()>2/3||c==0)&&c<255)
    {
    c++
    d[a]=2;
    }
    else
    {
    if ((Math.random()<=1/2||c==255)&&c>0)
    {
    c--
    d[a]=1;
    }
    else d[a]=0;
    }
    return c
    }
    function do_it(a,c)
    {
    if ((d[a]==2&&c<255)||c==0)
    {
    c++
    d[a]=2
    }
    else
    if ((d[a]==1&&c>0)||c==255)
    {
    c--;
    d[a]=1;
    }
    if (a==3)
    {
    if (d[1]==0&&d[2]==0&&d[3]==0)
    flag=1
    }
    return c
    }
    function flash()
    {
    if (flag==0)
    {
    r=ran(1, r);
    g=ran(2, g);
    b=ran(3, b);
    hex(1,r)
    hex(2,g)
    hex(3,b)
    document.body.style.background="#"+t[1]+o[1]+t[2]+o[2]+t[3
    
    ]+o[3]
    flag=50
    }
    else
    {
    r=do_it(1, r)
    g=do_it(2,g)
    b=do_it(3,b)
    hex(1,r)
    hex(2,g)
    hex(3,b)
    document.body.style.background="#"+t[1]+o[1]+t[2]+o[2]+t[3
    
    ]+o[3]
    flag--
    }
    
    setTimeout('flash()',50)
    }
    //-->
    </script>
    <!--Put the rest INSIDE the body tag-->
    
    <body onload="flash()">


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  2. #2
    Junior Member
    elliottedgar87 is offline

    Posts
    0
    I forgot to say that the first
    r=
    g=
    b=
    bit is the starting colour of the background.


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