方法:1.

    console=console||{log:function(){return;}

方法:2.

window.console = window.console || (function(){ 
var c = {}; c.log = c.warn = c.debug = c.info = c.error = c.time = c.dir = c.profile = c.clear = c.exception = c.trace = c.assert = c.dir = c.profile = c.clear = c.exception = c.trace = c.assert = function(){}; return c; return c;