Four ways to define a declarative function in JavaScript

Four ways to define a declarative function in javascript: http://blog.163.com/zzf_fly/blog/static/209589158201286104927248/

Method One: function functionname ([parameters]) {functionbody};

Method Two: Assign an unnamed functional function to a specified variable (var): Var add=function (A, b) {}

Method Three: Use the new operator to declare functions varname=new function ([Param1name, Param2name,... paramnname], functionbody);

Method Four: Write the JavaScript code directly in the middle of the html/jsp code:

For example: In a hyperlink:

<href= "#"  onclick= "[javascript:] var booleanvalue = confirm (' Mid-Autumn Festival holiday?? '); alert (' result = ' +booleanvalue); >Click</a>

Four ways to define a declarative function in JavaScript