日期:2014-05-16 浏览次数:20393 次
功能:放大缩小,拖动,变换样式(图片)问题:修改图片透明度时会闪
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title> New Document </title> <meta name="Generator" content="EditPlus"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <style type="text/css"> .drag{position:relative;cursor:hand} </style> <script language="javascript"> var dragapproved = false; var picture,x,y function move(){ //拖动鼠标 if(event.button==1&&dragapproved){ picture.style.pixelLeft=temp1+event.clientX-x picture.style.pixelTop=temp2+event.clientY-y return false; } } function drags(){ //拖动前的初始化工作 if(!document.all) return if(event.srcElement.className=="drag"){ dragapproved = true picture=event.srcElement; temp1=picture.style.pixelLeft temp2=picture.style.pixelTop x=event.clientX y=event.clientY document.onmousemove=move } } document.onmousedown=drags //按下鼠标左键 document.onmouseup=new Function("dragapproved=false") //松开鼠标左键 </script><!-- 拖动鼠标,实现图像拖动功能--> <script language="javascript"> function Counting(count){ if(event.wheelDelta>=120) //event.wheelDelta设置或获取滚轮按钮滚动的距离和方向。 count++; else if(event.wheelDelta<=-120) count--; return count; }//滚轮每滚动一次使count加/减1 var count=10; function Picture(){ count=Counting(count); Resize(count); return false; }//滚轮滚动后适当控制图片的缩放比例 var pic = "img1.jpg"; var opacity = 100; function Resize(count){ var m = document.getElementById('map'); if (count <= 8) { if (m.src.indexOf("img2.jpg") > 0 && opacity == 100) { pic= "img1.jpg"; var num=setInterval(function(){ChangePic(num)},200); } } else { if (m.src.indexOf("img1.jpg") > 0 && opacity == 100) { pic= "img2.jpg"; var num=setInterval(function(){ChangePic(num)},200); } } m.style.zoom=count+'0%'; }//设置图片缩放大小 function ChangePic(num) { var m = document.getElementById("map"); opacity = opacity - 20; if (opacity <= 0) { clearInterval(num); opacity = 100; m.src = pic; } m.style.filter = "alpha(opacity=" + opacity + ")"; } </script><!-- 滚动鼠标滚轮,实现图像缩放功能--> <img src="img1.jpg" width="1337" height="905" border="0" alt="" align="middle" id="map" class="drag" style="margin:0" onmousewheel="Picture()"> </head> <body> </body> </html>