【原创】动态获取缩放图片的长度、宽度和显示比例

【原创】动态获取缩放图片的长度、宽度和显示比例 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

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<TITLE>动态获取缩放图片的长度、宽度和显示比例</TITLE>

<!--

//缩放对象. 调用方式: zoomObj(this)

function zoomObj(o)

{

var zoom = parseInt(o.style.zoom, 10)||100;

zoom += event.wheelDelta/12;

if (zoom>0)

{

o.style.zoom=zoom+'%';

}

return false;

}

var iOriginalWidth, iOriginalHeight; //存放图片原始长度、宽度

//动态显示图片的长度、宽度和显示比例

function dispCurrentSize()

{

var zoom = document.all.idImg.style.zoom;

zoom = eval(zoom.substring(0, zoom.length-1));

var iWidth = zoom * document.all.idImg.width;

var iHeight = zoom * document.all.idImg.height;

document.all.idPicCurrentSize.innerHTML = "图片当前大小长：" + Math.ceil(iWidth/100) + " 高：" + Math.ceil(iHeight/100) + "显示比例：" + Math.ceil((iWidth / iOriginalWidth)) + "%";

}

//显示图片原始长度、宽度

function dispOriginalSize(oImg)

{

iOriginalWidth = oImg.width;

iOriginalHeight = oImg.height;

document.all.idPicOriginalSize.innerHTML = "图片原始大小长：" + iOriginalWidth + " 高：" + iOriginalHeight;

document.all.idImg.style.zoom = "100%";

dispCurrentSize();

}

//-->

</SCRIPT>

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