www.webdeveloper.com
Results 1 to 7 of 7

Thread: Regular expression to enforce 2 digits after decimal point

  1. #1
    Join Date
    Jan 2013
    Posts
    3

    Regular expression to enforce 2 digits after decimal point

    <html>
    <script>
    function doCheck(txtidval)
    {
    var i,exceptions=[8,46,37,39,13,9]; // backspace, delete, arrowleft & right, enter, tab
    var isException=false;
    var isDot=(190==event.keyCode); // dot
    //Value which is typed
    var k=String.fromCharCode(event.keyCode);

    for (i=0;i<exceptions.length;i++)
    {
    if(exceptions[i]==event.keyCode)
    isException=true;
    }

    if(isNaN(k) && (!isException) && (!isDot))
    {
    event.returnValue=false;
    }
    else
    {
    var p=new String(document.getElementById(txtidval).value+k).indexOf(".");


    if((p<document.getElementById(txtidval).value.length-2 || isDot) && p>-1 && (!isException))
    {
    event.returnValue=false;
    }
    else if(document.getElementById(txtidval).value.length>=3 && (!isException) && p==-1)
    {
    //dot checking
    if(event.keyCode != "190")
    {
    alert(document.getElementById(txtidval).value);
    event.returnValue=false;
    }
    }
    else if(document.getElementById(txtidval).value>=3)
    {
    alert(document.getElementById(txtidval).value);
    }
    }
    }
    </script>
    <body>
    <input type="textbox" id="txtid" onkeydown="doCheck('txtid')"/>
    </body>
    </html>

    i dont need output like .21 and also after entering 575 when moving curson in front of 575 it allows dot(".") so please kindly correct it

  2. #2
    Join Date
    Sep 2008
    Location
    Jackson MS
    Posts
    585
    /(\d*\.\d\d)\D*/ Should do it. You can take result[1] to parseFloat to read it.

  3. #3
    Join Date
    Jan 2013
    Posts
    3
    Hi Wbport Thanks for answering ..where we use that in my code ?

  4. #4
    Join Date
    Sep 2008
    Location
    Jackson MS
    Posts
    585
    Code:
    result = valueFromATextArea.match(/(\d*\.\d\d)\D*)
    if (result == null)
      alert("Insert appropriate squawk here");
    else
      var theNumberIWantToLookAt = parseFloat(result[1]);
    Last edited by wbport; 01-09-2013 at 07:37 AM. Reason: Add CODE tags to format

  5. #5
    Join Date
    Jan 2013
    Posts
    3
    Thanks wbport

  6. #6
    Join Date
    Dec 2005
    Location
    TX
    Posts
    7,931

    Lightbulb

    An alternative solution...
    Code:
    <!DOCTYPE HTML>
    <html>
    <head>
    <title> Untitled </title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    
    </head>
    <body>
    <input type="text" onkeyup="return processNumber(this)" value="">
    <script type="text/javascript">
    function processNumber(info) {
      var v = info.value;
      var n = v.split('.');
      if (n[1] != undefined) { v = n[0]+'.'+n[1].substring(0,2); }
      info.value = v;
      return true;
    }
    </script>
    
    </body>
    </html>

  7. #7
    Join Date
    Sep 2008
    Location
    Jackson MS
    Posts
    585
    My first line should have read: result = valueFromATextArea.match(/(\d*\.\d\d)\D*/)

    The last slash was needed to terminate the regular expression.

Thread Information

Users Browsing this Thread

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

Tags for this Thread

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 0.30724 seconds
  • Memory Usage 2,903KB
  • 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
  • (7)memberaction_dropdown
  • (1)navbar
  • (4)navbar_link
  • (1)navbar_moderation
  • (1)navbar_noticebit
  • (1)navbar_tabs
  • (2)option
  • (7)postbit
  • (7)postbit_onlinestatus
  • (7)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 (73):
  • 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_postinfo_query
  • fetch_postinfo
  • 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
  • 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