📄 ch09_q1.htm

📁 javascript source code part1

💻 HTM

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<HTML>
<HEAD>
<SCRIPT LANGUAGE=JavaScript>

var imagesSelected = new Array(false,false,false);
var noOfImages = 3;
var totalImagesSelected = 0;

function window_onload() 
{
   setInterval("switchImage()",4000);
}

function switchImage() 
{

   var imageIndex;

   if (totalImagesSelected == noOfImages)
   {
      for (imageIndex = 0; imageIndex < noOfImages; imageIndex++)
      {
         imagesSelected[imageIndex] = false;
      }

      totalImagesSelected = 0;
   }


var selectedImage = Math.floor(Math.random() * noOfImages) + 1;
while (imagesSelected[selectedImage - 1] == true)
{
      selectedImage = Math.floor(Math.random() * noOfImages) + 1;
   }
   totalImagesSelected++;
   imagesSelected[selectedImage - 1] = true;
   document.imgAdvert.src = "AdvertImage" + selectedImage + ".jpg";

}

</SCRIPT>
</HEAD>
<BODY ONLOAD="window_onload()">
<IMG SRC="AdvertImage1.jpg" NAME="imgAdvert">
</BODY>
</HTML>

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