The method for JavaScript to obtain and modify value is to use the value attribute to modify its value. The code is [var a=document.getElementById("hello");].
The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, DELL G3 computer.
javascript Get the method of modifying value:
Some elements have value attributes, such as input, bottom, select, etc. You can use the value attribute to modify its value.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>修改value</title>
</head>
<body>
<input type="text" name="hello" value="Hello krray" id="hello">
<script>
var a=document.getElementById("hello");
alert( a.value);
a.value="你好,小凯"
</script>
</body>
</html>Related free learning recommendations: javascript video tutorial
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