jquery - Selecting Text through JavaScript -

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i want select text thats on html page , make bold, using following code

<script type="text/javascript" >   function getselectedtext(){      if(window.getselection){   ;         return window.getselection().tostring();      }      else if(document.getselection){;         return document.getselection();      }      else if(document.selection){ ;          return document.selection.createrange().text;      }  }  $(document).ready(function(){  $("*").live("mouseup",     function() {         selection = getselectedtext();          alert(selection);         if(selection.length >= 3) {              $(this).html($(this).html().replace(selection, "<b>" + selection + "</b>") );          }            } );  });  </script>

this code works fine when text in 2 different paragraphs/ div or if there link between text doesnt seem work.

how make work ?

if want kind of highlighting of current selection, using built-in document.execcommand() easiest way. works in major browsers.

the following should want on selection, including ones spanning multiple elements. in non-ie browsers turns on designmode, applies background colour , switches designmode off again.

update

fixed work in ie 9.

function makeeditableandhighlight(colour) {     var range, sel = window.getselection();     if (sel.rangecount && sel.getrangeat) {         range = sel.getrangeat(0);     }     document.designmode = "on";     if (range) {         sel.removeallranges();         sel.addrange(range);     }     // use hilitecolor since browsers apply backcolor whole block     if (!document.execcommand("hilitecolor", false, colour)) {         document.execcommand("backcolor", false, colour);     }     document.designmode = "off"; }  function highlightselection(colour) {     var range;     if (window.getselection) {         // ie9 , non-ie         try {             if (!document.execcommand("backcolor", false, colour)) {                 makeeditableandhighlight(colour);             }         } catch (ex) {             makeeditableandhighlight(colour)         }     } else if (document.selection && document.selection.createrange) {         // ie <= 8 case         range = document.selection.createrange();         range.execcommand("backcolor", false, colour);     } }  document.onmouseup = function() {     highlightselection("red"); };

live example: http://jsfiddle.net/ebqbu/9/


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