I have two pages - "page 1" and "page 2". On page 1 there's an text-box with a value of e.g. 100 and a button at the end.
By pressing the button I want javascript to save the value of the textbox in a global (?) variable and jump to page 2. With "window.onload" I want a second Javascript-function to alert the value saved at page1.
Here's my Javascript code:
<script type="text/javascript">
var price; //declare outside the function = global variable ?
function save_price(){
alert("started_1"); //just for information
price = document.getElementById('the_id_of_the_textbox').value;
alert(price); //just for information
}
<script type="text/javascript">
function read_price(){
alert("started_2");
alert(price);
}
On "page 1" I have this send-Button with:
<input class="button_send" id="button_send" type="submit" value="Submit_price" onclick="save_price();"/>
It starts the Javascript function and redirects me correctly to my page2.
But with this ont the second page:
window.onload=read_price();
I always get an "undefined" value of the global variable price.
I've read a lot about those global variables. E.g. at this page: Problem with global variable.. But I can't get it working...
Why is this not working?
Without reading your code but just your scenario, I would solve by using localStorage
.
Here's an example, I'll use prompt()
for short.
On page1:
window.onload = function() {
var getInput = prompt("Hey type something here: ");
localStorage.setItem("storageName",getInput);
}
On page2:
window.onload = alert(localStorage.getItem("storageName"));
You can also use cookies but localStorage allows much more spaces, and they aren't sent back to servers when you request pages.