JavaScript 实现图片加载时自动按比例缩放

// 方案：setSelectReadOnly 用于设定极select控件ReadOnly,

// 此为一个模拟只读而非真正的只读

// 调用了onbeforeactivate,onfocus,onmouseover,onmouseout事件

图片自动缩放实现原理

// 示例：< img src='img.jpg' onload='ImgAutoSize(ImgD,FitWidth,FitHeight)' > ;

// 创建者：sl

ImgAutoSize 函数代码详解

function ImgAutoSize(imgD,FitWidth,FitHeight)

var image1=new Image();

image1.onload = function ()

if(this.width>0 && this.height>0)

if(this.width/this.height>= FitWidth/FitHeight)

if(this.width>FitWidth)

imgD.width=FitWidth;

imgD.height=(this.height*FitWidth)/this.width;

else

imgD.width=this.width;

imgD.height=this.height;

else

if(this.height>FitHeight)

imgD.height=FitHeight;

imgD.width=(this.width*FitHeight)/this.height;

else

imgD.width=this.width;

imgD.height=this.height;

image1 = null;

image1.src=imgD.src;

imgD.style.cursor = 'hand';

imgD.onclick= function(){openWin(this.src,'imgphoto',600,400)};

imgD.title = "点击在新窗口中查看原图";