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How to display and hide the prompt information in the input box

Source: Internet
Author: User
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When html + css + javascrpt is used for page creation, we often encounter small details that affect user experience and are easily overlooked. For example, how can we display and hide the prompt information in the input box based on how the object gets and loses focus. I would like to share this tips with you today ~~~

I. Requirements

The input box hides the prompt information when the cursor is displayed. When the cursor leaves the input box, the prompt information is displayed.

Ii. Method

1. Give the input an id, Onfocus = "method name 1 (this)", onblur = "method name 2 (this )"

2. Declare the variable value and obtain the input using the id name.

3. function Method Name 1 (inputObj ){
Copy codeThe Code is as follows:
If (inputObj. value = "......") {

InputObj. value = "";

}

}

4. function Method Name 2 (inputObj ){
Copy codeThe Code is as follows:
If (inputObj. value = ""){

InputObj. value = "......";

}

}

5. Note: if multiple input tags on the same page need the same settings, the method names cannot be consistent.

Iii. Instances
Copy codeThe Code is as follows:
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Title> untitled document </title>
<Link href = "file: // E |/previous website/midi/css/index.css" type = "text/css" rel = "stylesheet"/>
<Script type = "text/javascript">
Var value = document. getElementById ('shuru ');
Function qingkong (inputObj ){
If (inputObj. value = "enter your name "){
InputObj. value = "";
}
}
Function likai (inputObj ){
If (inputObj. value = ''){
InputObj. value = "enter your name ";
}
}

</Script>
<Style type = "text/css">
/* The text below can change the background color of the input box in IE browser */
. Search input {star: expression (onmouseover = function (){
This. style. backgroundColor = "# FF0000"
},
Onmouseout = function (){
This. style. backgroundColor = "# FFFFFF"
})
}
</Style>
</Head>
<Body>
<Input type = "text" id = "shuru" value = "Enter the song name or singer name" onfocus = "qingkong (this)" onblur = "likai (this)"/>
</Body>
</Html>

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