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Various methods to change the SELECT option of HTML drop-down box_HTML/Xhtml_Web page production
Various methods to change the SELECT option of HTML drop-down box_HTML/Xhtml_Web page production
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Release： 2016-05-16 16:40:40
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The HTML page returned after submitting the form is re-rendered. Neither the value nor selectedIndex attributes of the SELECT control can make the drop-down box retain the state before submitting the form.
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The code is as follows:
A temporary solution is to add a script at the end of the vm file to assign a value to the drop-down box :
Another solution is to set the default selected item :
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The code is as follows:
The way to write it in VTL is :
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code As follows:
For velocity, comparisons, especially those involving inequality comparisons (greater than or less than) are relatively difficult to implement. Now I want to display the file sizes on the page in categories (Bytes, MB, GB), so it involves comparing filesize sizes. Is there a better way to achieve this? For example, the following code:
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The code is as follows:# if ($filesize > 1024 && $filesize < 1048567)
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