When text box value change in CRM 2015 onpremises

Hi,

I came across one problem when i clicked on save button without moving out of cursor from textbox,the system take old value from the textbox and if i clicked any where before save button then system take new value from textbox. 

Can you any body please tell me when any text value change in CRM whether onkeypress or onblur ?

Thanks in Advance

Nausher