HTML vs CSS vs Javascript

HTML is a semantic markup language, used to describe its contents. It is never to describe how its content *looks* nor *behaves*.

CSS is for describing how your content LOOKS.

Javascript is for describing how your content BEHAVES.

Tables are just part of HTML — and they have a place in marking up content: they are for tabular data.

If you content is something you’d use in Excel, it is a good choice for a table.

If you are using a table to position content on the page or “make things line up” then you are misusing HTML for layout purposes.

Exception Details in JavaScript

function displayException(e,method)
{
 if(method != null)
 {
  alert('Error occured in ' + method);
 }
 if(e instanceof EvalError)
 {
  alert('Eval function is used in an incorrect manner. Error name: ' + e.name + '. Error message: ' + e.message);
 }
 else if(e instanceof RangeError)
 {
  alert('A numeric variable exceeds its allowed range. Error name: ' + e.name + '. Error message: ' + e.message);
 }
 else if(e instanceof ReferenceError)
 {
  alert('An invalid reference is used. Error name: ' + e.name + '. Error message: ' + e.message);
 }
 else if(e instanceof SyntaxError)
 {
  alert('Syntax error occured while parsing JavaScript code. Error name: ' + e.name + '. Error message: ' + e.message);
 }
 else if(e instanceof TypeError)
 {
  alert('The type of a variable is not as expected. Error name: ' + e.name + '. Error message: ' + e.message);
 }
 else if(e instanceof URIError)
 {
  alert('encodeURI() or decodeURI() functions are used in an incorrect manner. Error name: ' + e.name + '. Error message: ' + e.message);
 }
 else 
 {
  alert('An unspecified error occurred!. Error name: ' + e.name + '. Error message: ' + e.message);
 }
}