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Usage of input in JavaScript: First create an HTML sample file; then create a form in the body and specify an input field through the input tag; finally enter the form control element object method in the js code.
The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.
Common input methods in JavaScript
##Common events for form objects: onfocus: Triggered when the form element receives input focus;
onblur: Triggered when the form element loses input focus.
For example: when the text box loses focus, the following code will call the myfun() function.
Common methods of form control element objects blur()
Let the cursor leave the current element
Let the cursor fall Go to the current element
Used for elements of type text, textarea, password to select the content entered by the user
Imitates a mouse click on the current element Element
Effect display
Code implementation
<!DOCTYPE html><html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<p id="info">
<h2>填写相关信息</h2>
<form action="" method="post">
<input type="text" name="name" id="name" value="姓名" />
<br />
<input type="text" name="contact" id="contact" value="QQ或者电话" />
</form>
</p>
<script type="text/javascript">
window.onload = function() {
var inname = document.getElementsByTagName("input");
for (i = 0; i < inname.length; i++) {
//使用匿名函数
inname[i].onmouseover = function() {
this.focus();
}
inname[i].onfocus = function() {
this.select();
}
}
}
</script>
</body></html>[Recommended learning:
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