Alert is a function invocation, with a single string as a parameter.

alert是个函数调用，只有一个字符串作为参数。

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In this case, the function invocation must be accomplished using a POST request (as opposed to a GET request).

在本例中，这个函数调用必须通过POST请求(而非GET请求)完成。

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In the function invocation, the order of parameters passed in corresponds to the the order of XSL: params in the function definition.

函数调用中传递的参数顺序与函数定义中xsl： param的顺序对应。

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