Javascript to get text box, drop-down box, simple example of Single-sheet value _ javascript tips-JS tutorial

This article mainly introduces a simple example of JS text box, drop-down box, and single-region value. If you need it, you can refer to it for help. 1. Text Box

1.1

Use var t = document. getElementById ("test"). value to assign the value to variable t,

1.2 of course, you can also assign the known variable value to the text box, for example:

Var m = "5 ";
Document. getElementById ("test"). value = m;

2. drop-down list box

2.1
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Use var s = document. getElementById ("sel"). value to getThe value selected in the box. The value = "2" option is selected by default, so the value assigned to the variable s is "2" instead of "22 ",If you wantFor example, "3" corresponds to "text value" ("33") assigned to the test text box, you can use the following method,

The Code is as follows: