function open2(url, opt){
  if (opt == 0) // current window
    window.location = url;
  else if (opt == 1) // new window
    window.open(url);
  else if (opt == 2) // background window
    {window.open(url); self.focus();}
}

function getSel(){
var w=window,d=document,gS='getSelection';
return (''+(w[gS]?w[gS]():d[gS]?d[gS]():d.selection.createRange().text)).replace(/(^\s+|\s+$)/g,'');
}

// insert code here..

alert('too       much'); //comment1
alert/*comment2*/('another     much');    var   a   =   1;
if(a == 1)
   a = 2
else
   a = 1

// insert code here..

// part of embedded javascript code
log49 = [];//log49 is global variable.
var num = 1;
log49.push('num = '+num); // log the state of num
num = num+1;
log49.push('second num ='+num); // again.

javascript:(function(){var w=window,d=document,rg=/\bhtt(p|ps)\:\/\/\S+\b/ig,gS='getSelection';var links=(''+(w[gS]? w[gS]():(d[gS]?d[gS]():d.selection.createRange().text))).match(rg);if(confirm(links.join('\n')))for(var i=0,len=links.length;i<len;i++) w.open(links[i]);alert('done');})()

javascript:(function(){
  var w=window,d=document,rg=/\bhtt(p|ps)\:\/\/\S+\b/ig,gS='getSelection';

  // set links = the list of strings of the form http:/... or https:/... in the selected area
  var links=(''+(w[gS]? w[gS]():(d[gS]?d[gS]():d.selection.createRange().text))).match(rg);

  // if user confirms the list then open them all in new windows and then alert 'done'.
  if(confirm(links.join('\n')))
     for(var i=0,len=links.length;i<len;i++)
        w.open(links[i]);alert('done');
})()