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In Netscape Navigator 4 you can combine the documents find() method with the documents getSelection() method to create a simple page search facility. The Copy button copies any selected/highlighted text into the form. The Find button then attempts to find any ocurrences of the text in the form in the page.
<script language="JavaScript1.2"><!-- if (document.layers) { document.write('<form name="myform">'); document.write('<input type="text" name="mytext">'); document.write(' <input type="button" name="getstring" value="Copy" onClick="document.myform.mytext.value = document.getSelection()">'); document.write(' <input type="button" value="Find" onClick="find(document.myform.mytext.value,false)">'); document.write('<\/form>'); } //--></script>