HTML- Altering Input Value

问题:

I recently posted a similar question, but after some discussion, the question turned out to be quite a bit different than it was originally stated, so I thought it best to post this as a new question. I am trying to use an input field to show a total (I would consider using another element type, but I need to do the same thing in other places where an input field is actually required, so I may as well fix the problem now). The problem is that the HTML of the table containing these fields needs to be reloaded on occasion, i.e. in table creation, I use the Jquery $('#table1').html($('#table1').html() + <next_table_line>);. This causes the input field to revert to the value displayed in its value attribute, which doesn't change when I use the $('#input1').val(<some_value>); setter or when I enter data manually. Does anyone know of a solution to my problem? I need to be able to add rows to the table without loosing my data, but I can't figure out how to do this.

回答1:

You're reloading your entire table with the line $('#table1').html($('#table1').html() + <next_table_line>);. You should be appending to your table instead. Take the following sample small table:

<table id="test">
    <tr><td>test</td></tr>
</table>

Now, to add a new row, dont re-write the entire table HTML, just append!

$("#test").append("<tr><td>See im new!</td></tr>");

Demo: http://jsfiddle.net/uB2Rq/1/