Javascript的Error對象在不同瀏覽器是不一樣的.
IE比較搞，第一個參數是number，其他瀏覽器第一個參數是message。Firefox則除了支持message以外還加入了兩個參數fileName和lineNumber。但是在其文檔中注明了非標准（Non-standard）
IE的文檔http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
Firefox的文檔https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Error
各個瀏覽器的比較文檔
http://help.dottoro.com/ljfhismo.php
http://www.aptana.com/reference/html/api/Error.html
Creating a new Error object:
Internet Explorer supports the following form:
var errorObj = new Error([number[, description]]);
number
Optional. Integer that specifies the error code. Default is 0. Sets the error property of the Error object.
message
Optional. String that specifies the message of the error. Default is an empty string. Sets the description and messageproperties of the Error object.
Firefox supports the following form:
var errorObj = new Error([message[, fileName[, lineNumber]]]);
message
Optional. String that specifies the message of the error. Default is an empty string. Sets the description and messageproperties of the Error object.
fileName
Optional. String that specifies the name of the file where the error occurs. Default is the file where the Error object is created. Sets the fileName property of the Error object.
lineNumber
Optional. Integer that specifies the line number where the error occurs. Default is the line number, where the Errorobject is created. Sets the lineNumber property of the Error object.
Opera, Google Chrome and Safari support the following form:
var errorObj = new Error([message]);
message
Optional. String that specifies the message of the error. Default is an empty string. Sets the description and messageproperties of the Error object.