CODE HIỆU ỨNG HOA RƠI

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CODE HIỆU ỨNG HOA RƠI ( Thêm khối rồi paste vào hoặc đặt vào mục thông tin bản quyền )

-Mã code như sau -

<script>

//var pictureSrc = ‘http://img244.imageshack.us/img244/1024/snowbw4.gif’;

//the location of the snowflakes//Noel

var pictureSrc =

‘http://s351.photobucket.com/albums/q463/web_tgth/th_Hoadao.gif’; //the

location of the snowflakes//Xuân var pictureWidth = 20; //the width of the snowflakes

var pictureHeight = 20; //the height of the snowflakes

var numFlakes = 10; //the number of snowflakes

var downSpeed = 0.01; //the falling speed of snowflakes (portion of

screen per 100 ms) var lrFlakes = 10; //the speed that the snowflakes should swing

from side to side

if( typeof( numFlakes ) != ‘number’ || Math.round( numFlakes ) != numFlakes ||

numFlakes < 1 ) { numFlakes = 10; }

//draw the snowflakes for( var x = 0; x < numFlakes; x++ ) { if( document.layers ) { //releave NS4 bug document.write(‘<layer id=”snFlkDiv’+x+’”><img src=”’+pictureSrc+’” height=”’+pictureHeight+’” width=”’+pictureWidth+’” alt=”*”

border=”0”></layer>’);

} else { document.write(‘<div style=”position:absolute;” id=”snFlkDiv’+x+’”><img src=”’+pictureSrc+’” height=”’+pictureHeight+’” width=”’+pictureWidth+’”

alt=”*” border=”0”></div>’);

} } //calculate initial positions (in portions of browser window size)

var xcoords = new Array(), ycoords = new Array(), snFlkTemp;

for( var x = 0; x < numFlakes; x++ ) { xcoords[x] = ( x + 1 ) / ( numFlakes + 1 );

do { snFlkTemp = Math.round( ( numFlakes – 1 ) * Math.random() );

} while( typeof( ycoords[snFlkTemp] ) == ‘number’ );

ycoords[snFlkTemp] = x / numFlakes;

} //now animate function flakeFall() { if( !getRefToDivNest(‘snFlkDiv0’) ) { return; } var scrWidth = 0, scrHeight = 0, scrollHeight = 0, scrollWidth = 0;

//find screen settings for all variations Doing this every time allows for

resizing and scrolling if( typeof( window.innerWidth ) == ‘number’ ) { scrWidth = window.innerWidth;

scrHeight = window.innerHeight; } else { if( document.documentElement && ( document.documentElement.clientWidth ||

document.documentElement.clientHeight ) ) { scrWidth = document.documentElement.clientWidth; scrHeight =

document.documentElement.clientHeight; } else { if( document.body && ( document.body.clientWidth ||

document.body.clientHeight ) ) { scrWidth = document.body.clientWidth; scrHeight =

document.body.clientHeight; } } } if( typeof( window.pageYOffset ) == ‘number’ ) { scrollHeight = pageYOffset;

scrollWidth = pageXOffset; } else { if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) )

{ scrollHeight = document.body.scrollTop; scrollWidth =

1

BLOG HÓA HỌC Nguyễn Đình Hành

document.body.scrollLeft; } else { if( document.documentElement && ( document.documentElement.scrollLeft ||

document.documentElement.scrollTop ) ) { scrollHeight = document.documentElement.scrollTop; scrollWidth = document.documentElement.scrollLeft; } }

} //move the snowflakes to their new position for( var x = 0; x < numFlakes; x++ ) { if( ycoords[x] * scrHeight > scrHeight – pictureHeight ) { ycoords[x] = 0; } var divRef = getRefToDivNest(‘snFlkDiv’+x); if( !divRef ) { return; } if( divRef.style ) { divRef = divRef.style; } var oPix = document.childNodes ?

‘px’ : 0;

divRef.top = ( Math.round( ycoords[x] * scrHeight ) + scrollHeight ) + oPix; divRef.left = ( Math.round( ( ( xcoords[x] * scrWidth ) – ( pictureWidth / 2 ) ) + ( ( scrWidth / ( ( numFlakes + 1 ) * 4 ) ) * ( Math.sin( lrFlakes * ycoords[x] ) – Math.sin( 3 * lrFlakes * ycoords[x] ) ) ) ) + scrollWidth ) +

oPix;

ycoords[x] += downSpeed;

}}

//DHTML handlers function getRefToDivNest(divName) { if( document.layers ) { return document.layers[divName]; } //NS4

if( document[divName] ) { return document[divName]; } //NS4 also

if( document.getElementById ) { return document.getElementById(divName); }

//DOM (IE5+, NS6+, Mozilla0.9+, Opera) if( document.all ) { return document.all[divName]; } //Proprietary DOM – IE4

return false;

} window.setInterval(‘flakeFall();’,100);</script>

-Hết -Chúc các thầy cô vui !

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