jquery to Val and ATRR ("value", the difference in assignment

When doing the project, I passed the data from the background to a text box to assign value, through the Google Browser,

When the changes are found without modification, the final check for the following reason, the original is jquery in Val and ATRR ("value", the difference between the browser,

Therefore, the summary is as follows:

The use of Val () and ATRR (' value ') in jquery, assuming that there is a default value, if the value is assigned with Val (), then Google cannot get the most recent value when it is worth the change, but IE can,
For ATRR (' value ' if there is a default value, ie and Google will be able to get the latest changes when the change is worth it, the current tests on IE and Google are not tested by other browsers. Ha ha

jquery to Val and ATRR ("value", the difference in assignment