how to specify css role jquery code example

Example 1: jquery add style

//revising Ankur's answer
//Syntax:
$(selector).css({property-name:property-value});

//Example:
$('.bodytext').css({'color':'red'});

Example 2: styling element using jquery

Syntax:
$(selector).css(property-name:property-value);

Example:
$('.bodytext').css('color':'red');