string str =
    "<script language=\"JavaScript\"><!--{CustomPage}\n"
    + "    function OsEnterNoAction( event ) {\n"
    + "        if ( event.keyCode==13 ){\n"
    + "            if ( event.srcElement.type=='text' ){\n"
    + "                return false;\n"
    + "            }\n"
    + "        }\n"
    + "    }\n"
    + "    --></script>\n";