How to obtain the URL of this file upload in multiple forms and implement js code_javascript skills

Suppose there are multiple forms in a web page, and one of the forms has file upload.

Copy the code The code is as follows:

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The question is how to get this file What about the uploaded URL?
The following is a JavaScript code example

Copy the code The code is as follows:

function showUploadUrl() {
for(var i=0; ivar form = document.forms[i];
for (var j=0; jif ( form.elements[j].type==="file") {
alert("The upload address is:" form.action);
}
}
}
}