Javascript: displaying images with onchange event Post: 302925552

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Top Forums Programming Javascript: displaying images with onchange event Post 302925552 by Akshay Hegde on Monday 17th of November 2014 10:56:45 PM

11-17-2014

Moderator

Quote:

Originally Posted by figaro

I dont understand this solution. You are declaring an object test that is not actually used for display purposes. This looks very hackish to me:

Code:

img = document.getElementById("test")

I just added attribute id while creating img element for easy access, I have checked for img element with id test, if it doesn't exist already in body, then create img element append to div distribution, else meaning img element with id test, already exists so we don't have to create again, so just access element where id is "test" img = document.getElementById("test"), and change attribute src inside the switch statement. First you try with pictures other than svg ( png, jpeg ), you will be able to view changes, as and when there is a change in dropdown. You will understand better if you could use some debug tool like firebug etc.

Thanks

Akshay Hegde

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LEARN ABOUT SUSE

img

img-intro(n)															      img-intro(n)

NAME

       img-intro - Introduction to Img

SYNOPSIS

       package require Tk

       package require Img  ?1.3?

DESCRIPTION

       Img is a Tk extension, adding support for many other Image formats, as listed below. The individual formats are described in more detail on
       their own pages.

       bmp    Windows bitmap format.  See img-bmp.

       gif    The venerable graphics interchange format (with transparency, but without LZW. The latter due to patent issues).	See img-gif.

       ico    Windows icon files.  See img-ico.

       jpeg   The format for lossy compressed still pictures specified by the Joint Picture Experts Group.  See img-jpeg.

       pcx    Paintbrush image format.	See img-pcx.

       pixmap While the other formats are handlers for the Tk photo image type this is a new image type for Tk.  See img-pixmap.

       png    Portable Network Graphics, successor to GIF.  See img-png.

       ppm    Portable Pixmaps.  See img-ppm.

       ps     Postscript and PDF (Portable document format). Requires an external application, ghostview, for its operation.  See img-ps.

       sgi    Native SGI format.  See img-sgi.

       sun    Sun raster images.  See img-sun.

       tga    Targa files.  See img-tga.

       tiff   Tagged Interchange File Format.  See img-tiff.

       window ???  See img-window.

       xbm    X Bitmaps.  See img-xbm.

       xpm    X Pixmaps.  See img-xpm.	This version only works with Tcl/Tk 8.2 or higher. If you are using Tk 8.1 or lower please stick with  Img
	      1.2.4 (which is still available). And if you are using Tk4.2 or lower, please stick with Img 1.1.4 (which is also still available).

SEE ALSO

       img-bmp,  img-gif,  img-ico, img-jpeg, img-pcx, img-pixmap, img-png, img-ppm, img-ps, img-sgi, img-sun, img-tga, img-tiff, img-window, img-
       xbm, img-xpm

KEYWORDS

       bmp, gif, ico, image handling, jpeg, pcx, pdf, pixmap, png, postscript, ppm, ps, sgi, sun, tga, tiff, tk, window, xbm, xpm

COPYRIGHT

       Copyright (c) 1995-2003 Jan Nijtmans <nijtmans@users.sourceforge.com>

Img									1.3							      img-intro(n)