[BM] Plain URL 2 Link

//-----javascript---code
var D=document;
D.body.normalize();
F(D.body);

function F(n){
var u,A,M,R,c,x;
if(n.nodeType==3){
u=n.data.search(/https?\:\/\/[^\s]*[^.,;'">\s\)\]]/);
if(u>=0) {
M=n.splitText(u);
R=M.splitText(RegExp.lastMatch.length);
A=document.createElement("A");
A.href=M.data;
A.appendChild(M);
R.parentNode.insertBefore(A,R);
}
}
else if(n.tagName!="STYLE" && n.tagName!="SCRIPT" && n.tagName!="A"){
for(c=0;x=n.childNodes[c];++c)F(x);
}
}




//-----bookmarklet---version
javascript:(function(){var%20D=document;%20D.body.normalize();%20F(D.body);%20function%20F(n){var%20u,A,M,R,c,x;%20if(n.nodeType==3){%20u=n.data.search(/https?\:\/\/[^\s]*[^.,;'">\s\)\]]/);%20if(u>=0)%20{%20M=n.splitText(u);%20R=M.splitText(RegExp.lastMatch.length);%20A=document.createElement("A");%20A.href=M.data;%20A.appendChild(M);%20R.parentNode.insertBefore(A,R);%20}%20}else%20if(n.tagName!="STYLE"%20&&%20n.tagName!="SCRIPT"%20&&%20n.tagName!="A")for(c=0;x=n.childNodes[c];++c)F(x);%20}%20})();


Source: http://forums.mozillazine.org/viewtopic.php?f=38&t=1045955