Making Life Simple » javascript http://www.lalitmehta.com/home Thu, 19 Jan 2012 09:13:52 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Access parent window from modalDialog http://www.lalitmehta.com/home/2008/08/15/access-parent-window-from-modaldialog/?utm_source=rss&utm_medium=rss&utm_campaign=access-parent-window-from-modaldialog http://www.lalitmehta.com/home/2008/08/15/access-parent-window-from-modaldialog/#comments Fri, 15 Aug 2008 20:49:08 +0000 lalit http://www.lalitmehta.com/home/?p=55 When you call showModalDialog() you need to pass “self”, without the quotes, as the second argument.

You can then access the parent(opener) with:
var opener = window.dialogArguments;

You can then access any function declared in parent window with:
opener.myFunction();

]]> http://www.lalitmehta.com/home/2008/08/15/access-parent-window-from-modaldialog/feed/ 0 Rules for Speeding Up Your Web Site http://www.lalitmehta.com/home/2007/09/04/rules-for-speeding-up-your-web-site/?utm_source=rss&utm_medium=rss&utm_campaign=rules-for-speeding-up-your-web-site http://www.lalitmehta.com/home/2007/09/04/rules-for-speeding-up-your-web-site/#comments Wed, 05 Sep 2007 03:25:24 +0000 lalit http://www.lalitmehta.com/home/2007/09/04/rules-for-speeding-up-your-web-site/ Yahoo Developer Network posted a nice set of rules to speed up your website. The excerpt is as follows:

  1. Make Fewer HTTP Requests
  2. Use a Content Delivery Network
  3. Add an Expires Header
  4. Gzip Components
  5. Put Stylesheets at the Top
  6. Put Scripts at the Bottom
  7. Avoid CSS Expressions
  8. Make JavaScript and CSS External
  9. Reduce DNS Lookups
  10. Minify JavaScript
  11. Avoid Redirects
  12. Remove Duplicate Scripts
  13. Configure ETags

You can read the full article here.

]]> http://www.lalitmehta.com/home/2007/09/04/rules-for-speeding-up-your-web-site/feed/ 0 Validate e-mail address with regular expression http://www.lalitmehta.com/home/2007/08/02/validate-e-mail-address-with-regular-expression/?utm_source=rss&utm_medium=rss&utm_campaign=validate-e-mail-address-with-regular-expression http://www.lalitmehta.com/home/2007/08/02/validate-e-mail-address-with-regular-expression/#comments Fri, 03 Aug 2007 00:03:17 +0000 lalit http://www.lalitmehta.com/home/?p=22 /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/

All regular expressions start and end with forward slashes to differentiate them from ordinary string expressions. Most regular expressions start matches at the first character ^ and end at the last $.

Now we try to match the mailbox name which can include periods and dashes \w+ states one or more alphanumeric must be at the start of the name. ([\.-]?\w+)* allows periods or dashes to be included in the mailbox name with the trailing \w+ ensuring that those characters can not finish the name. The @ is the mandatory separator.

The domain name can have several .xx or .xyz suffixes such as .com.uk. Once again \w+ ensures that domain starts with an alphanumeric and ([\.-]?\w+)* allows for the dashes and periods. Finally (\.\w{2,3})+ ensures that there is at least one suffix of between 2 and 3 characters preceded by a period.

Note: This is not a completely foolproof validation as it does not account for new domain names of 4 or more characters. Also not all two and three letter combinations are legitimate domains!

]]> http://www.lalitmehta.com/home/2007/08/02/validate-e-mail-address-with-regular-expression/feed/ 0 Trim a string with all types of spaces http://www.lalitmehta.com/home/2007/08/02/trim-a-string-with-all-types-of-spaces/?utm_source=rss&utm_medium=rss&utm_campaign=trim-a-string-with-all-types-of-spaces http://www.lalitmehta.com/home/2007/08/02/trim-a-string-with-all-types-of-spaces/#comments Thu, 02 Aug 2007 23:51:38 +0000 lalit http://www.lalitmehta.com/home/?p=21 var a = “151 “;
a = a.replace(/^\s+|\s+$/, “”);

//a is now “151″ .

Note:
\s : Matches a single white space character, including space, tab, form feed, line feed.
Equivalent to [ \f\n\r\t\v\u00A0\u2028\u2029].

\S: Matches a single character other than white space.
Equivalent to [^ \f\n\r\t\v\u00A0\u2028\u2029].

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