Javascript selecting text with bookmarklet example

Here is a example of selecting text in Javascript. I've create a bookmarklet that let you search a word in dictionary.com. Just remove tabs and newline.

javascript:(
  function(){
    var str="";
    if(window.getSelection){
      str=window.getSelection();
    } else if(document.getSelection){
      str=document.getSelection();
    } else if(document.selection){
      str=document.selection.createRange().text;
    }
    var d=window.open("http://dictionary.reference.com/" +
        "search?q="+str,"dictionary","1");
    window.setTimeout(function(){d.focus()},300);
  }
)()

Javascript string replace

Didn't know Javascript had regular expression support.

    var str = "abcabc";
    str.replace("a", "#");
    document.write( str );

will print "abcabc".

    var str = "abcabc";
    document.write( str.replace("a", "#") );

will print "#bcabc".

    var str = "abcabc";
    document.write( str.replace(/a/g, "#") );

will print "#bc#bc".

    var str = "ABCABC";
    document.write( str.replace(/a/i, "#") );

will print "#BCABC".

    var str = "ABCABC";
    document.write( str.replace(/a/gi, "#") );

will print "#BC#BC".