从HTML表单获取动态值到javascript

Question

I am using javascript to add element dynamically. Here count is defined and increasing by one

<span style="margin-left:10px;">File Type : <select name="select_type_'+count+'" >
<option value="select">Select</option></span>

I using an another javascript function to get the value of select_type_'+count+' by using

var temp=parseInt((document.submission.select_type_+i.value));
alert(temp);

here var i is defined and incrementing

but i am getting NaN value .how to solve this?thanks in advance

Answer 1

Try this instead:

var temp=parseInt((document.submission['select_type_'+i].value));
alert(temp);

The JavaScript parser interprets your original code as document.submission.select_type plus i.value . Since neither document.submission.select_type nor i.value are defined, you're getting NaN from parseInt .