Javascript Class Syntax

Apr 3, 2006

I discovered this syntax on the google example of a client to their web
service.

function PagClass()
{
this.init();
}

PagClass.prototype = {

init : function() {
this.m_bInited = true;
this.m_nTotalRows = 0;
this.m_nFirstRowNum = 0;
this.m_nRowsPerPage = 0;
this.m_nNumPages = 0;
this.m_nReportid = 0;
this.m_nResultNumStart = 0;
this.m_strStart = "";
},

foo: function() {...},
bar: function() {...}
}

This seems like a very elegant way to create classes in javascript,
gives you a constructor and lists methods as comma separated
properties.

My colleague is suspicious that there may be excessive runtime overhead
associated with the prototype, property list way of doing this.
Anybody know for sure?

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