Solved

Multiple javascript slideshows - need help defining different slideshow lengths

Posted on 2003-11-06
5
303 Views
Last Modified: 2008-03-10
The code below works only when all slide shows are the same length ie they contain the same amount of pictures.  A blank image appaears in the slideshow with three images since the other slide show before it has four images.  I need a code that will make it possible to run these slideshows with different numbers of image snad will not show blank spots.  Can anyone help.  This is the code.  Thanks

<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin

NewImg1 = new Array (
"images/callisto.jpg",
"images/io.jpg",
"images/ganymede.jpg",
"images/europa.jpg"
);

NewImg2 = new Array (
"images/io.jpg",
"images/callisto.jpg",
"images/ganymede.jpg"
);

NewImg3 = new Array (
"images/ganymede.jpg",
"images/callisto.jpg",
"images/io.jpg",
"images/ganymede.jpg",
"images/callisto.jpg",
"images/io.jpg",
"images/europa.jpg"
);





var ImgNum = 0;
var ImgLength = NewImg1.length - 1




//Time delay between Slides in milliseconds
var delay = 3000;

var lock1 = false;
var lock2 = false;
var lock3 = false;
var run1;
var run2;
var run3;





function chgImg(show,direction) {
  if (document.images) {
   ImgNum = ImgNum + direction;
   if (ImgNum > ImgLength) { ImgNum = 0; }
   if (ImgNum < 0) {ImgNum = ImgLength;  }
   if (show == 'show1' ){ document.slideshow1.src = NewImg1[ImgNum]; }
   if (show == 'show2' ){ document.slideshow2.src = NewImg2[ImgNum]; }
   if (show == 'show3' ){ document.slideshow3.src = NewImg3[ImgNum]; }
  }
}


function auto(show) {
if ( show == 'show1' ){
  if (lock1 == true) {
    lock1 = false;
    window.clearInterval(run1);
  } else if (lock1 == false) {
      lock1 = true;
      run1 = setInterval("chgImg('show1',1)", delay);
  }
}
if ( show == 'show2' ){
  if (lock2 == true) {
    lock2 = false;
    window.clearInterval(run2);
  } else if (lock2 == false) {
      lock2 = true;
      run2 = setInterval("chgImg('show2',1)", delay);
  }

}
if ( show == 'show3' ){
  if (lock3 == true) {
    lock3 = false;
    window.clearInterval(run3);
  } else if (lock2 == false) {
      lock3 = true;
      run3 = setInterval("chgImg('show3',1)", delay);
  }
}

}

//  End -->
</script>

</HEAD>


<BODY>
<center>
<img src="images/callisto.jpg" name="slideshow1" width="262" height="262">
<table>
<tr>
<td align="right"><a href="javascript:chgImg('show1',-1)">Previous</a></td>
<td align="center"><a href="javascript:auto('show1')">Auto/Stop</a></td>
<td align="left"><a href="javascript:chgImg('show1',1)">Next</a></td>
</tr>
</table>
</center>

<center>
<img src="images/io.jpg" name="slideshow2" width="262" height="261">
<table>
<tr>
<td align="right"><a href="javascript:chgImg('show2',-1)">Previous</a></td>
<td align="center"><a href="javascript:auto('show2')">Auto/Stop</a></td>
<td align="left"><a href="javascript:chgImg('show2',1)">Next</a></td>
</tr>
</table>
</center>

<center>
<img src="images/ganymede.jpg" name="slideshow3" width="262" height="261">
<table>
<tr>
<td align="right"><a href="javascript:chgImg('show3',-1)">Previous</a></td>
<td align="center"><a href="javascript:auto('show3')">Auto/Stop</a></td>
<td align="left"><a href="javascript:chgImg('show3',1)">Next</a></td>
</tr>
</table>
</center>





</BODY>
</HTML>
0
Comment
Question by:dialektkid
  • 2
  • 2
5 Comments
 
LVL 10

Expert Comment

by:Bustarooms
ID: 9695607
without changing your code too much you can add this

var theLength=(show == 'show1') ? NewImg1.length -1 : (show == 'show2') ? NewImg2.length - 1 : NewImg3.length-1;


in your chgImg function before the if(document.images)
0
 
LVL 10

Accepted Solution

by:
Bustarooms earned 250 total points
ID: 9695610
oh and you need to change something else....here the new chgImg function

function chgImg(show,direction) {
var theLength=(show == 'show1') ? NewImg1.length -1 : (show == 'show2') ? NewImg2.length - 1 : NewImg3.length-1;
 if (document.images) {
  ImgNum = ImgNum + direction;
  if (ImgNum > theLength) { ImgNum = 0; }
  if (ImgNum < 0) {ImgNum = theLength;  }
  if (show == 'show1' ){ document.slideshow1.src = NewImg1[ImgNum]; }
  if (show == 'show2' ){ document.slideshow2.src = NewImg2[ImgNum]; }
  if (show == 'show3' ){ document.slideshow3.src = NewImg3[ImgNum]; }
 }
}
0
 
LVL 4

Expert Comment

by:apprenti
ID: 9695731
var ImgLength = NewImg1.length - 1

This variable is being used as the length for all the slideshows.
0
 
LVL 4

Expert Comment

by:apprenti
ID: 9695913
Sometimes it can be worth doing a little cut and paste, and making separate functions with different variable names in each. If each slideshow is controlled by a separate function, there's less chance of this sort of problem arising.
0
 

Expert Comment

by:bhatiashardeep
ID: 9696034
Check out with some changes in your code only
<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">

NewImg1 = new Array (
"temp_files/1.jpg",
"temp_files/2.jpg",
"temp_files/3.jpg",
"temp_files/4.jpg"
);

NewImg2 = new Array (
"temp_files/1.jpg",
"temp_files/2.jpg",
"temp_files/3.jpg"
);

NewImg3 = new Array (
"temp_files/1.jpg",
"temp_files/3.jpg",
"temp_files/2.jpg",
"temp_files/4.jpg",
"temp_files/1.jpg",
"temp_files/2.jpg",
"temp_files/3.jpg"
);





var ImgNum1 = 0;
var ImgNum2 = 0;
var ImgNum3 = 0;
var ImgLength = NewImg1.length - 1




//Time delay between Slides in milliseconds
var delay = 1000;

var lock1 = false;
var lock2 = false;
var lock3 = false;
var run1;
var run2;
var run3;





function chgImg(show,direction) {
 
  if (document.images) {
   if (show == 'show1' ){
   document.slideshow1.src = NewImg1[ImgNum1];
   if(ImgNum1==NewImg1.length-1)
            ImgNum1=0
      else
            ImgNum1++;            
    }
   if (show == 'show2' ){
   document.slideshow2.src = NewImg2[ImgNum2];
   if(ImgNum2==NewImg2.length-1)
            ImgNum2=0
      else
            ImgNum2++;
   }
   if (show == 'show3' ){
   document.slideshow3.src = NewImg3[ImgNum3];
      if(ImgNum3==NewImg3.length-1)
            ImgNum3=0
      else
            ImgNum3++;
   }
  }
}


function auto(show) {
if ( show == 'show1' ){
  if (lock1 == true) {
    lock1 = false;
    window.clearInterval(run1);
  } else if (lock1 == false) {
      lock1 = true;
      run1 = setInterval("chgImg('show1',1)", delay);
     
  }
}
if ( show == 'show2' ){
  if (lock2 == true) {
    lock2 = false;
    window.clearInterval(run2);
  } else if (lock2 == false) {
      lock2 = true;
      run2 = setInterval("chgImg('show2',1)", delay);
  }

}
if ( show == 'show3' ){
  if (lock3 == true) {
    lock3 = false;
    window.clearInterval(run3);
  } else if (lock2 == false) {
      lock3 = true;
      run3 = setInterval("chgImg('show3',1)", delay);
  }
}

}


</script>

</HEAD>


<BODY>
<center>
<img src="images/callisto.jpg" name="slideshow1" width="262" height="262" id="slideshow1">
<table>
<tr>
<td align="right"><a href="javascript:chgImg('show1',-1)">Previous</a></td>
<td align="center"><a href="javascript:auto('show1')">Auto/Stop</a></td>
<td align="left"><a href="javascript:chgImg('show1',1)">Next</a></td>
</tr>
</table>
</center>

<center>
<img src="images/io.jpg" name="slideshow2" width="262" height="261" id="slideshow2">
<table>
<tr>
<td align="right"><a href="javascript:chgImg('show2',-1)">Previous</a></td>
<td align="center"><a href="javascript:auto('show2')">Auto/Stop</a></td>
<td align="left"><a href="javascript:chgImg('show2',1)">Next</a></td>
</tr>
</table>
</center>

<center>
<img src="images/ganymede.jpg" name="slideshow3" width="262" height="261" id="slideshow3">
<table>
<tr>
<td align="right"><a href="javascript:chgImg('show3',-1)">Previous</a></td>
<td align="center"><a href="javascript:auto('show3')">Auto/Stop</a></td>
<td align="left"><a href="javascript:chgImg('show3',1)">Next</a></td>
</tr>
</table>
</center>





</BODY>
</HTML>
0

Featured Post

Top 6 Sources for Identifying Threat Actor TTPs

Understanding your enemy is essential. These six sources will help you identify the most popular threat actor tactics, techniques, and procedures (TTPs).

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
dynamics crm 2011 - Web Resources 1 27
Auto Submit on dropdown box 14 32
Add Background to a PDF Programmatically 1 25
onOpen 14 43
In my daily work (mainly using ASP.net), I need to write a lot of JavaScript code. One of the most repetitive tasks I do are the jQuery Ajax calls. You know: (CODE) I don't know if for you it's the same, but for me is soooo tedious to write the …
Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now