Javascript alert php result

Question 1

First of all sorry im a really big beginner

I have a bit of a problem

i have a mysql query what select data from my users

the code looks like this
$r = mysql_query(" SELECT reader FROM users WHERE username = 'Tom' ") or die (mysql_error());
$result = mysql_fetch_array($r);
$vv = $result['reader'];
echo '<div id="reader">'.$vv.'</div>';

so it selects tom is a reader, the reader field contains yes or no, i echo it out it says yes, thats ok.

and i would like to alert this value with javascript.

i added an id reader

the javascript

<script>
var readers = document.getElementById("reader"); 
 alert(readers.value);
</script>

and im keep getting an alert window undefined.

could please someone point me to te right path what im missing? and is it possible to alert the value this way?

Question 2

Use console.log in Firebug or Chrome console instead of alert's.

Question 3

element.value will try to read the "value" attribute for the element. Use innerHTML and you will get the elements including text inside of the element <el>this is the inner html</el> in a string:

alert(readers.innerHTML);

Question 4

now i feel complete stupid, thank you for the help, i learned something new today thanks to you, and thank you for spending time on my question, it works

Question 5

Note, .innerHTML will give you the contents (elements, attributes, and visible text nodes) of what is inside of the element. So if you had markup wrapped around your element, it would return that markup. For instance, an example might be: <div id="reader"><p>'.$vv.'</p></div>', you would get the `<p>reader</p>' back.

Question 6

.value will look for the value="" attribute of an element and therefore will throw back undefined if this attribute is not applied to the element in question.

So you don't want .value you want .innerHTML

Question 7

Try this in jquery

<script>
 alert($("#readers").html()); 
</script>

Baversjo 3,7163 gold badges38 silver badges49 bronze badges · Accepted Answer · 2011-08-06 09:05:24Z

4

element.value will try to read the "value" attribute for the element. Use innerHTML and you will get the elements including text inside of the element <el>this is the inner html</el> in a string:

alert(readers.innerHTML);

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edited Aug 6, 2011 at 9:08

Jared Farrish's user avatar

Jared Farrish

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answered Aug 6, 2011 at 9:05

Baversjo's user avatar

Baversjo

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2 Comments

Side

Side Over a year ago

now i feel complete stupid, thank you for the help, i learned something new today thanks to you, and thank you for spending time on my question, it works

2011年08月06日T09:08:09.61Z+00:00

Jared Farrish

Jared Farrish Over a year ago

Note, .innerHTML will give you the contents (elements, attributes, and visible text nodes) of what is inside of the element. So if you had markup wrapped around your element, it would return that markup. For instance, an example might be: <div id="reader"><p>'.$vv.'</p></div>', you would get the `<p>reader</p>' back.

2011年08月06日T09:13:11.93Z+00:00

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