Javascript get id

Question

function check(id){
    var _id = document.getElementById(id);
    url = "test.php?check=1&id=" + _id;
}

i want the id in the url it's working but without the id that is in the check('123');

It's for an innerHTML to load something

hope you can help me with getting the id

Greetings

Can you post more of your code so we can understand whatyou are trying to achieve — Russ Cam
– Russ Cam, Commented May 13, 2009 at 9:39

Alex Rozanski · Accepted Answer · 2009-05-13 09:37:38Z

4

The document.getElementId() function returns an object value based on the identifier string (ID) that you supply; therefore if you have an element on your page with the id of foo then you call

document.getElementById("foo");

to return the object for that element, so that you can manipulate it (changing styles, or attributes etc).

If you want to insert the id into the URL of the test.php page, why not simply pass the identifier string of the element that you pass in with the function?:

function check(id){
    url = "test.php?check=1&id=" + id;
}

Then calling

check("123");

will set the url variable to test.php?check=1&id=123

answered May 13, 2009 at 9:37

Alex Rozanski

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Darin Dimitrov · Accepted Answer · 2009-05-13 09:31:37Z

2

var _id = document.getElementById(id).id;

answered May 13, 2009 at 9:31

Darin Dimitrov

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2 Comments

annakata Over a year ago

Either the OP is unaware that .id will = the input to getElementById or this isn't what the OP wants, which is admittedly rather hard to decipher.

djairo Over a year ago

hi there, now i don't get anything before it gave me ?check=1&id=null i need to get ?check=1&id=123 thanks for the quick answer

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