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Create a link with value in form controls

< html> <head>   <script type="text/javascript">     function showWindow(){       var txt = document.form1.stringField.value       if (document.form1.hypertext[0].checked){         txt = txt.link(document.form1.jumptoField.value);       }else{         if (document.form1.hypertext[1].checked){           txt = txt.anchor(document.form1.jumptoField.value);         }       }       document.write(txt);     }   </script> </head> <body>   <form method="post" name="form1" action="null">       Text:       <input type="text" size="20" maxlength="256" name="stringField" />       <input type="radio" name="hypertext" value="Link" checked="checked" />       Link:       <input type="radio" name="hypertext" value="Anchor" />       Anchor:       Jump To:       <input type="text" size="30" maxlength="256" name="jumptoField" />     <input type="button" name="Show" value="Show" onclick="showWindow()" />   </form> </body> </html>