Download a File using JavaScript

I am implementing Download Manager using Javascript. I want to know How can I download a file from server using 开发者_运维技巧Javascript. Where Javascript will connect to server , Download a file and save it on local file system.

Kindly Help me out here , with all possibilities.

Regards, Brijesh Thakur

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You can download data, but you can't save anything to the local file system with javascript. This is impossible.