jQuery onBlur POST this.val（）

How would one trigger a jQuery POST of the current input on blur.

onblur="$.post(url,this.value)"?

You could use .blur() to bind the blur event handler to the input's that you want, and then simply invoke $.post() with the element's value:

$("input").blur(function () {
  $.post('url', { name: this.value });
});

You can send in an ajax post request to accomplish your task..

$("input").blur(function () {
   $.ajax({
        type: 'POST',
        url: 'url',
        dataType: 'json',
        data: { 'value' : $(this).val() },
        success : function(result){
        }
    });
});