انجمن کدستانMoisrex

// CREDITS:

// Gradient Background Fader, random colors

// by Peter Gehrig

// Copyright (c) 2003 Peter Gehrig. All rights reserved.

// Permission given to use the script provided that this notice remains as is.

// Additional scripts can be found at http://www.fabulant.com

// info@fabulant.com

// 11/20/2003

// IMPORTANT:

// If you add this script to a script-library or a script-archive

// you are required to insert a highly visible link to http://www.fabulant.com

// right into the webpage where the script

// will be displayed.

///////////////////////////////////////////////////////////////////////////

// CONFIGURATION STARTS HERE

///////////////////////////////////////////////////////////////////////////

// Select fade-effect below:

// Set 1 if the background may fade from dark to medium

// Set 2 if the background may fade from light to medium

// Set 3 if the background may fade from very dark to very light light

// Set 4 if the background may fade from light to very light

// Set 5 if the background may fade from dark to very dark

var fade_effect=3

// What type of gradient should be applied Internet Explorer 5x or higher?

// Set "none" or "horizontal" or "vertical"

var gradient_effect="horizontal"

// Speed higher=slower

var speed=60

///////////////////////////////////////////////////////////////////////////

// CONFIGURATION ENDS HERE

///////////////////////////////////////////////////////////////////////////

var browserinfos=navigator.userAgent

var ie4=document.all&&!document.getElementById

var ie5=document.all&&document.getElementById&&!browserinfos.match(/Opera/)

var ns4=document.layers

var ns6=document.getElementById&&!document.all

var opera=browserinfos.match(/Opera/)

var browserok=ie4||ie5||ns4||ns6||opera

if (fade_effect==1) {

var darkmax=1

var lightmax=127

}

if (fade_effect==2) {

var darkmax=127

var lightmax=254

}

if (fade_effect==3) {

var darkmax=1

var lightmax=254

}

if (fade_effect==4) {

var darkmax=190

var lightmax=254

}

if (fade_effect==5) {

var darkmax=1

var lightmax=80

}

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

var newred

var newgreen

var newblue

var oldred

var oldgreen

var oldblue

var redcol_1

var redcol_2

var greencol_1

var greencol_2

var bluecol_1

var bluecol_2

var oldcolor

var newcolor

var firsttime=true

var stepred=1

var stepgreen=1

var stepblue=1

function setrandomcolor() {

var range=(lightmax-darkmax)

if (firsttime) {

newred=Math.ceil(range*Math.random())+darkmax

newgreen=Math.ceil(range*Math.random())+darkmax

newblue=Math.ceil(range*Math.random())+darkmax

firsttime=false

}

oldred=Math.ceil(range*Math.random())+darkmax

oldgreen=Math.ceil(range*Math.random())+darkmax

oldblue=Math.ceil(range*Math.random())+darkmax

stepred=newred-oldred

if (oldred>newred) {stepred=1}

else if (oldred<newred) {stepred=-1}

else {stepred=0}

stepgreen=newgreen-oldgreen

if (oldgreen>newgreen) {stepgreen=1}

else if (oldgreen<newgreen) {stepgreen=-1}

else {stepgreen=0}

stepblue=newblue-oldblue

if (oldblue>newblue) {stepblue=1}

else if (oldblue<newblue) {stepblue=-1}

else {stepblue=0}

fadebg()

}

function fadebg() {

if (newred==oldred) {stepred=0}

if (newgreen==oldgreen) {stepgreen=0}

if (newblue==oldblue) {stepblue=0}

newred+=stepred

newgreen+=stepgreen

newblue+=stepblue

if (stepred!=0 || stepgreen!=0 || stepblue!=0) {

redcol_1 = hexc[Math.floor(newred/16)];

redcol_2 = hexc[newred%16];

greencol_1 = hexc[Math.floor(newgreen/16)];

greencol_2 = hexc[newgreen%16];

bluecol_1 = hexc[Math.floor(newblue/16)];

bluecol_2 = hexc[newblue%16];

newcolor="#"+redcol_1+redcol_2+greencol_1+greencol_2+bluecol_1+bluecol_2

if (ie5 && gradient_effect!="none") {

if (gradient_effect=="horizontal") {gradient_effect=1}

if (gradient_effect=="vertical") {gradient_effect=0}

greencol_1 = hexc[Math.floor(newred/16)];

greencol_2 = hexc[newred%16];

bluecol_1 = hexc[Math.floor(newgreen/16)];

bluecol_2 = hexc[newgreen%16];

redcol_1 = hexc[Math.floor(newblue/16)];

redcol_2 = hexc[newblue%16];

var newcolorCompl="#"+redcol_1+redcol_2+greencol_1+greencol_2+bluecol_1+bluecol_2

document.body.style.filter=

"progid:DXImageTransform.Microsoft.Gradient(startColorstr="+newcolorCompl+", endColorstr="+newcolor+" GradientType="+gradient_effect+")"

}

else {

document.bgColor=newcolor

}

var timer=setTimeout("fadebg()",speed);

}

else {

clearTimeout(timer)

newred=oldred

newgreen=oldgreen

newblue=oldblue

oldcolor=newcolor

setrandomcolor()

}

}

if (browserok) {

window.onload=setrandomcolor

}