//don't forget to add function dictionary() { if (navigator.appName!='Microsoft Internet Explorer') { var t = document.getSelection(); od(t); } else { var t = document.selection.createRange(); if(document.selection.type == 'Text' && t.text>'') { document.selection.empty(); od(t.text);} } function od(t) { t=t.replace(/[!.:?,;"]/, ''); while (t.substr(t.length-1,1)==' ') t=t.substr(0,t.length-1); while (t.substr(0,1)==' ') t=t.substr(1); if (t) window.open('http://www.thefreedictionary.com/'+encodeURIComponent(t), 'dict', 'width=700,height=500,resizable=1,menubar=1,scrollbars=1,status=1,titlebar=1,toolbar=1,location=1,personalbar=1'); } }; status='double-click any word - get its instant definition in the dictionary.'; document.ondblclick=dictionary; //works for IE only. For other browsers add