check if an input field is selected using javascript or jquery -

how can check if input field selected or not, using javascript or jquery ?

any appreciated! thanks!

some googleing found quick solution.

from http://forums.digitalpoint.com/showthread.php?t=77983

there's no built-in way; have use onfocus , onblur events set form of flag each element read.

this script automates process number of forms:

code:

<script type='text/javascript' > /* (c)2006 stephen chalmers  *   * appends 'hasfocus' flag text/textarea form  * elements.  *  insert script anywhere below last form in document.  read current focus state of specified element, use:  if( document.forms.myform.myelement.hasfocus )  ...  ***/  for(var i=0, df=document.forms, len=df.length; i<len; i++)  for(j=0, els=df[i].elements; j<els.length; j++)   if( /^text/.test( els[j].type ) )   {    els[j].hasfocus=false;    els[j].onfocus=function(){this.hasfocus=true;};    els[j].onblur =function(){this.hasfocus=false;};   }  </script>