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function getSelectedText() { //this function code is borrowed from: http://www.codetoad.com/javascript_get_selected_text.asp

var txt = "";
if (window.getSelection) {
txt = window.getSelection();
} else if (window.document.getSelection) {
txt = window.document.getSelection();
} else if (window.document.selection) {
txt = window.document.selection.createRange().text;
}
return txt;
}