Exercises

1. Write an XPath expression to find the cost of the first dish.
2. Write an XPath expression to find the cost of any dish, given its name.
3. Write a  web page for a browser (using DOM and JavaScript) to work out how much a meal consisting of two Spring Rolls and a portion of Sweet and Sour Pork will cost.

Helpful resources

• To experiment with XPath expressions in XML, install the XPath Checker.
• For XPath on real HTML web pages (rather than XML files) make sure that you have the DOM Inspector for Firefox (look under the Tools menu) and install the "XPather" addon from http://xpath.alephzarro.com/
• The Mozilla XPath & JavaScript tutorial ( http://www-xray.ast.cam.ac.uk/~jgraham/mozilla/xpath-tutorial.html )