www.webdeveloper.com
Results 1 to 3 of 3

Thread: dropdown list onchange problem

  1. #1
    Join Date
    Sep 2010
    Posts
    12

    dropdown list onchange problem

    Code:
    <script type="text/javascript">
    function ni(form) {
    		ni=parseFloat(form.ni.value);
    		form.ans4.value =  (form.lista1.value == "one")?0.62 : 
                               (form.lista1.value == "two")?0.8 :
    				           (form.lista1.value == "three") ?0.9 :
    						   
    						   'error';
    	                  }
    		
    		var ni;
    		var error;
    		if (form.lista1.value == "one")
    		{
    			document.write(ni=0.62);
    		}
    		else if (form.lista1.value == "two")
    		{
    			document.write(ni=0.8);
    		}
    		else if (form.lista1.value == "three")
    		{
    			document.write(ni=0.9);
    		}
    		
    			else
    	{
    		
    		document.write(error);
    	}
    </script>
    
    <FORM name="form2">
      <table width="93" border="1">
      <tr>
        <td colspan="2">formula</td>
      </tr>
      <tr>
        <td height="66" colspan="2"><div align="center">
          <select name="lista1" size="1" id="lista1" onchange="javascript: dropdownlist(this.options[this.selectedIndex].value);">
            <option value="one">one</option>
            <option value="two">two</option>
            <option value="three">three</option>
            </select>
          </div></td>
      <tr>
        <td>ni =</td>
        <td><input type "number" value="" name="ans4" size="9" /></td>
      </tr>
    
        
        
      </table>
    </FORM>
    What am i doing wrong?

    i want to display values in textbox on select...when user select one it should write 0.62 etc...
    pls help

  2. #2
    Join Date
    May 2003
    Location
    Between Baltimore and DC
    Posts
    3,579
    Why are you redefining the function name of ni and using it as a variable inside and than you use it as a local in a few lines later. Very bad practice there. Use variable names that have meaning.

    If you want the value of a select, use something like:

    Code:
    var mySelect = document.formName.elementName;
    var selectedOption = mySelect.options[mySelect.selectedIndex];
    var txt = selectedOption.text;
    var val = selectedOption.value;
    Tech Author [Ajax In Action, JavaScript: Visual Blueprint] | twitter | linkedin | http://www.pascarello.com

  3. #3
    Join Date
    Apr 2003
    Location
    Netherlands
    Posts
    21,654
    Code:
          <select name="lista1" size="1" id="lista1" onchange="this.form.ans4.value=this.value;">
            <option value="0.62">one</option>
            <option value="0.8">two</option>
            <option value="0.9">three</option>
            </select>
    At least 98% of internet users' DNA is identical to that of chimpanzees

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 0.10429 seconds
  • Memory Usage 2,857KB
  • 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
  • (3)bbcode_code
  • (1)footer
  • (1)forumjump
  • (1)forumrules
  • (1)gobutton
  • (1)header
  • (1)headinclude
  • (1)headinclude_bottom
  • (3)memberaction_dropdown
  • (1)navbar
  • (4)navbar_link
  • (1)navbar_moderation
  • (1)navbar_noticebit
  • (1)navbar_tabs
  • (2)option
  • (3)postbit
  • (3)postbit_onlinestatus
  • (3)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