Question

How do I check all input boxes to see if there are values when the document loads?

$(document).ready(function(){
   var inputVal=$("input").val().trim();
   if(inputVal!=''){
   }
})

I would like to do an action for any input boxes that have values.

Answer 1

This is one way:

$('input, select, textarea').each(
    function(){
        var val = $(this).val().trim();
        if (val == ''){
            // do stuff with the non-valued element
        }
    });

On closer reading it seems the OP wanted to do something with the non-empty fields, so:

$('input, select, textarea').each(
    function(){
        var val = $(this).val().trim();
        if (val.length){
            // do stuff with the valued element
        }
    });