How to call this JS? _PHP Tutorial

How to call this JS?

As shown in the picture, there are two sets of cascading menus for cities across the country: "Departure" and "Destination",
The cascading menu of cities across the country is made into a js file: city.js,
I currently successfully call the city.js file in the cascading menu of the "Departure" group, but failed to call city.js in the cascading menu of the "Destination" group,
May I ask how experts solve this problem?
Thanks! ~! ~


The form code is as follows:
form id="form1" name="search" method="post" action="">

Departure point:

Destination:

Please select




Please select





Please select




Please select







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Let me answer

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D8888D reply content------------------------------------------------- ----------
Thanks for your advice! ~
Please! ~

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To all the heroes and heroes from all walks of life, please leave your comments as you pass by in a hurry. Thank you! ~! ~

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I have to sigh deeply, no expert has given me a suggestive reply for two days,
Really disappointed! ~! ~

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This is the first time I see someone who only posted pictures but no code - -!

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OK, I'll post the code! ~! ~

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I want to help you...but I'm a newbie...I really can't help you[img]http://www.111cn.cn/bbs/images/smilies/default/sad.gif[/img]

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Code like yours may make everyone dizzy, but I have a piece of code that should be more practical. It has high portability. You can refer to it. It is also better maintained and supports unlimited classification: [url=http://yuepin.com /Explore/city.php] The link is marked http://yuepin.com/Explore/city.php[/url]. If you have any questions, you can ask them
I uploaded the file for sharing. Because it is fully JS output, you can also save the page

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D8888D reply content------------------------------------------------- ----------
In fact, the implementation is very simple and can be done with ajax. The following technologies are mainly used:
select's ID.options.add(new Option("text",value));

D8888D reply content------------------------------------------------- ----------
Two identical IDs are both s1, which is the reason for failure. I want to help you change it, but this ID is defined, hoho....

Reorganize your object IDs. Too confusing.


Please select




Please select






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http://www.bkjia.com/PHPjc/632558.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632558.htmlTechArticleHow to call this JS? As shown in the picture, there are two sets of national city cascading menus: "Departure" and "Destination". The national city cascading menu is made into a js file: city.js. I am currently in the "Out...