Update cheat-sheet.md

cheat-sheet.md

@@ -112,6 +112,14 @@ In the example above, to remove all files in the dir that start with '-' use it
 Set the command line history off with `set +o history` and on with: `set -o history`.  
 Alternatively, if you want to completely disable history then: `unset HISTFILE`.
 
+To write Javascript code in SAX Parser, use `CDATA` blocks to isolate the JS code from the wrath of XML like parser.  
+
+```javascript
+/*<![CDATA[*/
+...code...
+/*]]>*/
+```
+
 ## cURL
 
 Send form data using cURL with `curl -d 'param1=value1' -d 'param2=value2' URL`.