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The uniform motion of JavaScript animation effect

Source: Internet
Author: User
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HTML and CSS are written together for easy viewing, Div is set to 200 hidden by positioning, and span is positioned in the middle of the div by the left.

1 <!DOCTYPE HTML>2 <HTML>3 4 <Head>5     <MetaCharSet= "UTF-8">6     <title>Document</title>7     <styletype= "Text/css">8         * {9 margin:0;Ten padding:0; One font-size:12px; A         } -          - Div{ the width:200px; - Height:200px; - background:Green; - position:relative; +  Left:-200px; -         } +          A span{ at width:30px; - Height:30px; - Line-height:30px; - background:Red; - position:Absolute; -  Left:200px; in Top:85px; - text-align:Center; to cursor:Pointer; +         } -     </style> the </Head> *  $ <Body>Panax Notoginseng     <DivID= "Div"> -         <spanID= "Show">Show</span> the     </Div> +  A  the </Body> +  - </HTML>

JS section is to add the timer to set the Offsetleft value of self-increment and self-subtraction, to achieve div display and hidden effects

1<script>2         function$ (ID) {3             return typeofid = = = "string"?document.getElementById (ID): ID;4         }5 6Window.onload =function() {7             //defines a hidden div for PTO8             varPTO = $ ("div");9             //defines a button span of btnTen             varBTN = $ ("Show"); One             //define an empty timer A             varTimer =NULL; -  -             //button binds a mouse move event theBtn.onmouseenter =start; -  -             //custom functions are used to automatically increase -             functionstart () { +                 //prevent self-acceleration, clear the timer before each start - clearinterval (timer); +                 //Define a timer ATimer = SetInterval (show, 30); at             } -  -             //Custom function until the value of offsetleft is 0, otherwise the value of Offsetleft is increased from 2001 straight to 5 -             functionShow () { -                 if(Pto.offsetleft = = 0) { - clearinterval (timer); in}Else { -Pto.style.left = pto.offsetleft + 5 + ' px '; to                 } +             } -  the             //binding a mouse-out event *Btn.onmouseleave =Back ; $ Panax Notoginseng             //custom functions for automatic reduction of -             functionBack () { the clearinterval (timer); +Timer = setinterval (Clear, 30); A             } the  +             //Custom function until the value of offsetleft is-200, otherwise the Offsetleft value has been self-reduced by 5 -             functionClear () { $                 if(Pto.offsetleft = =-200) { $ clearinterval (timer); -}Else { -Pto.style.left = pto.offsetleft-5 + ' px '; the                 } -             }Wuyi  the         } -</script>

The uniform motion of JavaScript animation effect

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