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Wednesday, April 27, 2011

Java script preloader


<html>
<head>
<title>Preload Image Page</title>
<script language="JavaScript1.1">
<!-- begin hiding

/*
Preload Image With Update Bar Script (By Marcin Wojtowicz [one_spook@hotmail.com])
Submitted to and permission granted to Dynamicdrive.com to feature script in it's archive
For full source code to this script and 100's more, visit http://dynamicdrive.com
*/

// You may modify the following:
 var locationAfterPreload = "http://dynamicdrive.com" // URL of the page after preload finishes
 var lengthOfPreloadBar = 150 // Length of preload bar (in pixels)
 var heightOfPreloadBar = 15 // Height of preload bar (in pixels)
 // Put the URLs of images that you want to preload below (as many as you want)
 var yourImages = new Array("http://yourdomain.com/test1.gif","http://yourdomain.com/test2.gif")

// Do not modify anything beyond this point!
if (document.images) {
 var dots = new Array() 
 dots[0] = new Image(1,1)
 dots[0].src = "black.gif" // default preloadbar color (note: You can substitute it with your image, but it has to be 1x1 size)
 dots[1] = new Image(1,1)
 dots[1].src = "blue.gif" // color of bar as preloading progresses (same note as above)
 var preImages = new Array(),coverage = Math.floor(lengthOfPreloadBar/yourImages.length),currCount = 0
 var loaded = new Array(),i,covered,timerID
 var leftOverWidth = lengthOfPreloadBar%coverage
}
function loadImages() { 
 for (i = 0; i < yourImages.length; i++) { 
  preImages[i] = new Image()
  preImages[i].src = yourImages[i]
 }
 for (i = 0; i < preImages.length; i++) { 
  loaded[i] = false
 }
 checkLoad()
}
function checkLoad() {
 if (currCount == preImages.length) { 
  location.replace(locationAfterPreload)
  return
 }
 for (i = 0; i <= preImages.length; i++) {
  if (loaded[i] == false && preImages[i].complete) {
   loaded[i] = true
   eval("document.img" + currCount + ".src=dots[1].src")
   currCount++
  }
 }
 timerID = setTimeout("checkLoad()",10) 
}
// end hiding -->
</script>

</head>

<body bgcolor="#FFFFFF">

<center>
<font size="4">Please be patient while some images<br>
are being preloaded...</font><p>
0%
<script language="JavaScript1.1">
<!-- begin hiding
// It is recommended that you put a link to the target URL just in case if the visitor wants to skip preloading
// for some reason, or his browser doesn't support JavaScript image object.
if (document.images) {
 var preloadBar = ''
 for (i = 0; i < yourImages.length-1; i++) {
  preloadBar += '<img src="' + dots[0].src + '" width="' + coverage + '" height="' + heightOfPreloadBar + '" name="img' + i + '" align="absmiddle">'
 }
 preloadBar += '<img src="' + dots[0].src + '" width="' + (leftOverWidth+coverage) + '" height="' + heightOfPreloadBar + '" name="img' + (yourImages.length-1) + '" align="absmiddle">'
 document.write(preloadBar)
 loadImages()
}
document.write('<p><small><a href="javascript:window.location=locationAfterPreload">Skip Preloading</a>  |  <a href="http://dynamicdrive.com/">Script Credits</a></small></p>')
// end hiding -->
</script>
</center>
</body>
</html>

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