Attribute selectors

Attribute selectors are a particularly helpful subset of CSS selectors. They allow us to specify an element by one of its HTML attributes, such as a link's title attribute or an image's alt attribute. For example, to select all images that have an alt attribute, we write the following:

$('img[alt]') 

Styling links

Attribute selectors accept a wildcard syntax inspired by regular expressions for identifying the value at the beginning (^) or end ($) of a string. They can also take an asterisk (*) to indicate the value at an arbitrary position within a string or an exclamation mark (!) to indicate a negated value.

Let's say we want to have different styles for different types of links. We first define the styles in our stylesheet:

a { 
  color: #00c;  
} 
a.mailto { 
  background: url(images/email.png) no-repeat right top; 
  padding-right: 18px; 
} 
a.pdflink { 
  background: url(images/pdf.png) no-repeat right top; 
  padding-right: 18px; 
} 
a.henrylink { 
  background-color...