Can JavaScript Bookmarklets Modify Text Selections and Clipboard Contents?

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granpa
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can one write a javascript bookmark that will print a single unicode character (like a smiley face or a math symbol) to the clipboard (or better still straight to the cursor position)?

how about print something like (SUB) to the clipboard then append what is highlighted to the clipboard then append (/SUB) to it then paste the clipboard to the current text area?
 
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http://www.sitepoint.com/article/bookmarklets/

Replaces each letter in the selected text with its rot13 equivalent

javascript:var coding = "abcdefghijklmnopqrstuvwxyzabcdefghijklmABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLM"; function rot13(t) { for (var r = "",i=0;i<t.length;i++) { character = t.charAt(i); position = coding.indexOf(character); if (position > -1) character = coding.charAt(position + 13); r += character; } return r; } S=window.getSelection(); function t(N) { return N.nodeType == N.TEXT_NODE; } function r(N) { if (t(N)) N.data = rot13(N.data); } for (j=0;j<S.rangeCount;++j) { var g=S.getRangeAt(j), e=g.startContainer, f=g.endContainer, E=g.startOffset, F=g.endOffset, m=(e==f); if(!m||!t(e)) { /* rot13 each text node between e and f, not including e and f. */ q=document.createTreeWalker(g.commonAncestorContainer, NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT, null, false); q.currentNode=e; for(N=q.nextNode(); N && N != f; N = q.nextNode()) r(N); } if (t(f)) f.splitText(F); if (!m) r(f); if (t(e)) { r(k=e.splitText(E)); if(m)f=k; e=k;} if (t(f)) g.setEnd(f,f.data.length); } void 0
 
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