AJAX IE找不到元素（getElementByID（））

Question

I've searched everywhere i could but i did not find a solution to this specific problem.

To put it simple. I have a page with some javascript code and a DIV. I use ajax to load a second page inside that DIV. The loaded page has one element which id is "someid".

someid is <input type="hidden" id="someid" name="someid" value="sdasasdadad" />

then, on the loaded page i call a function that is defined on the "global" page that begins with these two lines:

var=document.getElementById("someid").value;

alert(var);

works fine on firefox but not on IE. On IE it doesnt display the alert and doesnt execute any code after those lines. I think the problem is that when the javascript code was evaluated, the "someid" element didnt exist yet and IE doesnt seem to understand that now it exists after i loaded a page using ajax. I hope i made myself clear?

I need to do things this way because this is only a small part of a bigger interface. I have no knowledge on jquery but it should work with this javascript code too i guess! How can i make this work?

Thanks a lot in advance!

Answer 1

var is used to declare variables. Do something like var el = document.getEl...

This is assuming your code is exactly the same as your production code, otherwise please show us the real code

EDIT: Since you said it "works" in Firefox, your code is probably inconsistent, since var = 3 in Chrome throws a SyntaxError and I imagine it would do so in Firefox too.

Answer 2

The var word is a keyword in Javascript. Here you are trying to use a keyword as an identifier which is illegal. Using a name other than var like myVar will fix the problem.

var myVar =document.getElementById("someid").value;
alert(myVar);

Answer 3

Try it like that. var is a reserved keyword for javascript

var someVar = document.getElementById("someid").value;

alert(someVar);

Answer 4

I would try debugging this by alerting the element and then the value :

var element = document.getElementById("someid");

alert(element);

var valueOfElement = element.value;

alert(valueOfElement);

I'm sure you haven't but you can't use var as a variable name, it's a Javascript keyword.