Need help capturing and passing data from an input box.

I tried the following two script to capture and pass data from an input box, but neither work. Please advise.
Thank you

$("input[name='loanAmount']").mouseleave(function(){
varAmount= $this.attr("input[name='loanAmount']").val();
_satellite.setVar('loanAmount',Amount);
_satellite.getVar('loanAmount');
return true;

Code (markup):

I also tried this.

varAmount= $this.attr("input[name='loanAmount']");
_satellite.setVar('loanAmount',Amount);
_satellite.getVar('loanAmount');
return true;

Code (markup):