Hola a todos!!

Hace unos dias encontré un script que hace una animación de degradados. Lo pongo en el <body>, pero los filtros són de MS y sólo me funciona con explorer. Alguien me puede decir cómo tengo que hacer para que chute en firefox?

Aqui os dejo el codigo:



Código :

<script>
   
   var colors=new Array("#9DFFF9","#F234E2","#FFF000","#46E031","#00FFDE","#FFC000","#FFFF66","#ff0000","#FFA4D7","#850044","#B56AFF","#56B1FF")
var pausebetweencolors=2
var gradient_effect="horizontal"
var speed=20
var i_loopmax=1000


var pausesteps=40
var hexc = new Array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F')
var redcol_1
var redcol_2 
var redcol_1_b
var redcol_2_b 
var greencol_1 
var greencol_2 
var greencol_1_b 
var greencol_2_b
var bluecol_1 
var bluecol_2 
var bluecol_1_b 
var bluecol_2_b
 
var rgbredfrom
var rgbgreenfrom
var rgbbluefrom
var rgbredto
var rgbgreento
var rgbblueto
var rgbrednow
var rgbgreennow
var rgbbluenow

var rgbredfrom_b
var rgbgreenfrom_b
var rgbbluefrom_b
var rgbredto_b
var rgbgreento_b
var rgbblueto_b
var rgbrednow_b
var rgbgreennow_b
var rgbbluenow_b

var colorhexafrom
var colorhexato

var i_step=1
var i_loop=0
var i_colorsA=0
var i_colorsB=1
var i_colorsC=1
var i_colorsD=2

pausebetweencolors*=1000

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

function translateintorgb() {

   var hexa=colors[i_colorsA]
   var hexared=hexa.substring(1,3)
   var hexagreen=hexa.substring(3,5)
   var hexablue=hexa.substring(5,7)
   rgbredfrom=parseInt("0x"+hexared)
   rgbgreenfrom=parseInt("0x"+hexagreen)
   rgbbluefrom=parseInt("0x"+hexablue)
   rgbrednow=rgbredfrom
   rgbgreennow=rgbgreenfrom
   rgbbluenow=rgbbluefrom
   
   var hexa=colors[i_colorsB]
   var hexared=hexa.substring(1,3)
   var hexagreen=hexa.substring(3,5)
   var hexablue=hexa.substring(5,7)
   rgbredto=parseInt("0x"+hexared)
   rgbgreento=parseInt("0x"+hexagreen)
   rgbblueto=parseInt("0x"+hexablue)
   
   var hexa=colors[i_colorsC]
   var hexared=hexa.substring(1,3)
   var hexagreen=hexa.substring(3,5)
   var hexablue=hexa.substring(5,7)
   rgbredfrom_b=parseInt("0x"+hexared)
   rgbgreenfrom_b=parseInt("0x"+hexagreen)
   rgbbluefrom_b=parseInt("0x"+hexablue)
   rgbrednow_b=rgbredfrom_b
   rgbgreennow_b=rgbgreenfrom_b
   rgbbluenow_b=rgbbluefrom_b
   
   var hexa=colors[i_colorsD]
   var hexared=hexa.substring(1,3)
   var hexagreen=hexa.substring(3,5)
   var hexablue=hexa.substring(5,7)
   rgbredto_b=parseInt("0x"+hexared)
   rgbgreento_b=parseInt("0x"+hexagreen)
   rgbblueto_b=parseInt("0x"+hexablue)
   i_colorsA++
   i_colorsB++
   i_colorsC++
   i_colorsD++
   if (i_colorsA>=colors.length) {i_colorsA=0}
   if (i_colorsB>=colors.length) {i_colorsB=0}
   if (i_colorsC>=colors.length) {i_colorsC=0}
   if (i_colorsD>=colors.length) {i_colorsD=0}
   
   changefromto()
}

function changefromto() {
   rgbrednow=rgbrednow-((rgbredfrom-rgbredto)/speed)
   rgbgreennow=rgbgreennow-((rgbgreenfrom-rgbgreento)/speed)
   rgbbluenow=rgbbluenow-((rgbbluefrom-rgbblueto)/speed)
   
   rgbrednow_b=rgbrednow_b-((rgbredfrom_b-rgbredto_b)/speed)
   rgbgreennow_b=rgbgreennow_b-((rgbgreenfrom_b-rgbgreento_b)/speed)
   rgbbluenow_b=rgbbluenow_b-((rgbbluefrom_b-rgbblueto_b)/speed)
   
   if (rgbrednow>255) {rgbrednow=255}
   if (rgbrednow<0) {rgbrednow=0}
   if (rgbgreennow>255) {rgbgreennow=255}
   if (rgbgreennow<0) {rgbgreennow=0}
   if (rgbbluenow>255) {rgbbluenow=255}
   if (rgbbluenow<0) {rgbbluenow=0}
   
   if (rgbrednow_b>255) {rgbrednow_b=255}
   if (rgbrednow_b<0) {rgbrednow_b=0}
   if (rgbgreennow_b>255) {rgbgreennow_b=255}
   if (rgbgreennow_b<0) {rgbgreennow_b=0}
   if (rgbbluenow_b>255) {rgbbluenow_b=255}
   if (rgbbluenow_b<0) {rgbbluenow_b=0}
   
   if (i_step<=speed) {
         redcol_1 = hexc[Math.floor(rgbrednow/16)];
        redcol_2 = hexc[Math.floor(rgbrednow)%16];
       greencol_1 = hexc[Math.floor(rgbgreennow/16)];
         greencol_2 = hexc[Math.floor(rgbgreennow)%16];
        bluecol_1 = hexc[Math.floor(rgbbluenow/16)];
         bluecol_2 = hexc[Math.floor(rgbbluenow)%16];
      
      redcol_1_b = hexc[Math.floor(rgbrednow_b/16)];
        redcol_2_b = hexc[Math.floor(rgbrednow_b)%16];
       greencol_1_b = hexc[Math.floor(rgbgreennow_b/16)];
         greencol_2_b = hexc[Math.floor(rgbgreennow_b)%16];
        bluecol_1_b = hexc[Math.floor(rgbbluenow_b/16)];
         bluecol_2_b = hexc[Math.floor(rgbbluenow_b)%16];
        var backcolor="#"+redcol_1+redcol_2+greencol_1+greencol_2+bluecol_1+bluecol_2
      var backcolor_b="#"+redcol_1_b+redcol_2_b+greencol_1_b+greencol_2_b+bluecol_1_b+bluecol_2_b
      if (ie5 && gradient_effect!="none") {
         if (gradient_effect=="horizontal") {var gr_effect=1}
         if (gradient_effect=="vertical") {var gr_effect=0}
           document.body.style.filter=
"progid:DXImageTransform.Microsoft.Gradient(startColorstr="+backcolor+", endColorstr="+backcolor_b+", GradientType="+gr_effect+")"
      }
      else {
           document.bgColor=backcolor 
      }

      i_step++
      var timer=setTimeout("changefromto()",pausesteps);
   
    } 
     else {
        clearTimeout(timer)
      i_step=1
      i_loop++
      if (i_loop<i_loopmax) {var timer=setTimeout("translateintorgb()",pausebetweencolors);}
     }
}


if (browserok) {
   window.onload=translateintorgb
}

   
   </script>