javascript - Force an Attachment to be open before Submitting a Form -

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i using bpm software create approval process.

the first user submit information related document , attach document form being submitted approval.

i trying build approval form requires user open attachment (normally pdf) before being able submit approval decision. once user opens attachment (or clicks link) approval selections enabled (approve, rework, cancel) , user submit.

i happy if selections enabled , submit disabled, either way submittal cannot happen until after file or link clicked.

if you're talking client validation, trick:

$('#pdflink').click(function(){     $('#submitbutton').prop('disabled', false); });

your submit button html should this: 

<input type="submit" id="submitbutton" disabled />

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