JavaScript DOM Programming Art placeholder placeholder IE8 compatible approach.

Source: Internet
Author: User

Learned in the 11th chapter of JavaScript DOM programming art.

Hint statement relative to text box substitution with JavaScript

1<! DOCTYPE html>234<meta charset= "UTF-8" >5<title>Document</title>6<script>7Window.onload =function() {8             //You need to determine whether the browser supports the placeholder property, and this code is called when no support is detected. 9             if(! (' Placeholder 'inchDocument.createelement (' Input '))){Ten                 //Get text Box object One                 varinput = document.getElementById (' z '); A                 //Get placeholder text -                 varInputvalue =Input.placeholder; -Input.onfocus =function(){ the                     if( This. Value = =inputvalue) { -                         //Resets the value of the input box to hide temporary placeholder text -Input.value = ""; -                     } +                 } -Input.onblur =function(){ +                     if( This. Value = = ""){ AInput.value =Inputvalue; at                     } -                 } -                 //adding placeholder text in the onblur processing function run - Input.onblur (); -             } -         } in</script> - to<body> +<form action= "" > -<input type= "text" placeholder= "Please enter ..." id = "Z" > the</form> *</body> $

JavaScript DOM Programming Art placeholder placeholder IE8 compatible approach.

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