www.webdeveloper.com
Results 1 to 4 of 4

Thread: pass javascript variable to html

  1. #1
    Join Date
    Apr 2012
    Posts
    19

    pass javascript variable to html

    Hello,

    I have the following form with a dynamically created select drop down menu:

    Code:
    <form method="post" name="submit" action="my_file.php" accept-charset='UTF-8'>
    <select id="likelihood_category" name="likelihood_category" onchange="update_message(this.options[selectedIndex].text)">
       {foreach value=category from=$likelihood_categories_display}
       <option {$category.selected} value="{$category.value}">{$category.value}</option>
       {/foreach}
    </select>
    </form>
    When an option is selected from the drop down menu, I would like the update_message javascript function to return a variable to my html page that I can use later. Here is my javascript code:

    Code:
    function update_message(field) {
        var category = field;
    
        if (category == 'Programmatic') {
            // show programmatic info
        }
        if (category == 'Technical') {
            // show technical info
        }
        if (category == 'Safety') {
            // show safety info
        }
    }
    When I get the return variable from the javascript code, I want to be able to do display text depending on what the variable equals.

    eg.:

    if return_var == x
    // display programmatic info
    if return_var == y
    // display technical info
    if retun_var == z
    // display safety info

    Can anyone help me with this? Thanks in advance!!!

  2. #2
    Join Date
    Jun 2012
    Location
    Dark Side of the Moon
    Posts
    70
    Considering the fact that HTML doesn't use variables, its not possible. You could easily use a tag that javascript can change the info for, or you could use document.write to write the information to the page, but HTML doesn't vary, its just replaced.
    I love how people get an attitude when THEY asked for help.

  3. #3
    Join Date
    Apr 2012
    Posts
    19
    Thanks for the info burnme!

    Is it possible to dictate where javascript will output the text from document.write? For example, if I want the text to show up on the page in a particular place, how do I dictate where the document.write text will be display?

    Could you give an example of how to use a tag that javascript can change the info for?

    I wanted the page to auto update based on the form selection, but I may just use php variable with a "refresh" button cause I know how to do that. =)

  4. #4
    Join Date
    Jun 2012
    Location
    Dark Side of the Moon
    Posts
    70
    Here is a link to document.write:

    http://www.w3schools.com/jsref/dom_obj_document.asp

    Also you may want to read up on cookies, may be applicable to as well, here is the overall info list on javascript with examples:

    http://www.w3schools.com/js/default.asp
    I love how people get an attitude when THEY asked for help.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
HTML5 Development Center

"

"

X vBulletin 4.2.2 Debug Information

  • Page Generation 0.37401 seconds
  • Memory Usage 2,867KB
  • Queries Executed 15 (?)
More Information
Template Usage (33):
  • (1)SHOWTHREAD
  • (1)ad_footer_end
  • (1)ad_footer_start
  • (1)ad_global_above_footer
  • (1)ad_global_below_navbar
  • (1)ad_global_header1
  • (1)ad_global_header2
  • (1)ad_navbar_below
  • (1)ad_showthread_firstpost_sig
  • (1)ad_showthread_firstpost_start
  • (1)ad_thread_first_post_content
  • (1)ad_thread_last_post_content
  • (2)bbcode_code
  • (1)footer
  • (1)forumjump
  • (1)forumrules
  • (1)gobutton
  • (1)header
  • (1)headinclude
  • (1)headinclude_bottom
  • (4)memberaction_dropdown
  • (1)navbar
  • (4)navbar_link
  • (1)navbar_moderation
  • (1)navbar_noticebit
  • (1)navbar_tabs
  • (2)option
  • (4)postbit
  • (4)postbit_onlinestatus
  • (4)postbit_wrapper
  • (1)spacer_close
  • (1)spacer_open
  • (1)tagbit_wrapper 

Phrase Groups Available (6):
  • global
  • inlinemod
  • postbit
  • posting
  • reputationlevel
  • showthread
Included Files (26):
  • ./showthread.php
  • ./global.php
  • ./includes/class_bootstrap.php
  • ./includes/init.php
  • ./includes/class_core.php
  • ./includes/config.php
  • ./includes/functions.php
  • ./includes/functions_navigation.php
  • ./includes/class_friendly_url.php
  • ./includes/class_hook.php
  • ./includes/class_bootstrap_framework.php
  • ./vb/vb.php
  • ./vb/phrase.php
  • ./includes/functions_facebook.php
  • ./includes/functions_calendar.php
  • ./includes/functions_bigthree.php
  • ./includes/class_postbit.php
  • ./includes/class_bbcode.php
  • ./includes/functions_reputation.php
  • ./includes/functions_notice.php
  • ./packages/vbattach/attach.php
  • ./vb/types.php
  • ./vb/cache.php
  • ./vb/cache/db.php
  • ./vb/cache/observer/db.php
  • ./vb/cache/observer.php 

Hooks Called (70):
  • init_startup
  • friendlyurl_resolve_class
  • init_startup_session_setup_start
  • database_pre_fetch_array
  • database_post_fetch_array
  • init_startup_session_setup_complete
  • global_bootstrap_init_start
  • global_bootstrap_init_complete
  • cache_permissions
  • fetch_threadinfo_query
  • fetch_threadinfo
  • fetch_foruminfo
  • load_show_variables
  • load_forum_show_variables
  • global_state_check
  • global_bootstrap_complete
  • global_start
  • style_fetch
  • global_setup_complete
  • showthread_start
  • showthread_getinfo
  • strip_bbcode
  • friendlyurl_clean_fragment
  • friendlyurl_geturl
  • forumjump
  • cache_templates
  • cache_templates_process
  • template_register_var
  • template_render_output
  • fetch_template_start
  • fetch_template_complete
  • parse_templates
  • fetch_musername
  • notices_check_start
  • notices_noticebit
  • process_templates_complete
  • friendlyurl_redirect_canonical
  • showthread_post_start
  • showthread_query_postids
  • showthread_query
  • bbcode_fetch_tags
  • bbcode_create
  • showthread_postbit_create
  • postbit_factory
  • postbit_display_start
  • postbit_imicons
  • bbcode_parse_start
  • bbcode_parse_complete_precache
  • bbcode_parse_complete
  • postbit_display_complete
  • memberaction_dropdown
  • tag_fetchbit_complete
  • forumrules
  • navbits
  • navbits_complete
  • build_navigation_data
  • build_navigation_array
  • check_navigation_permission
  • process_navigation_links_start
  • process_navigation_links_complete
  • set_navigation_menu_element
  • build_navigation_menudata
  • build_navigation_listdata
  • build_navigation_list
  • set_navigation_tab_main
  • set_navigation_tab_fallback
  • navigation_tab_complete
  • fb_like_button
  • showthread_complete
  • page_templates