javascript-how can I see result of every condition in one if statement By Debugging in Chrome?

I Have some javascript code that has if statements with multiple conditions .

I want to see which one is true or false in chrome debugging.

for example:

if(a.value=='' || (document.getElementById('test') && document.getElementById('test').value==='') || myfom_upload.value==='' )
{
 //some codes.
}

I want to see result of :

(a.value=='')====>(true or false)?

(document.getElementById('test')) ====>(true or false)?

document.getElementById('test') ====>(true or false)?

(document.getElementById('test').value==='') ====> (true or false)?

(myfom_upload.value==='')====>(true or false)?

How can I see result of every condition in one if statement By Debugging in Chrome?

Thanks