js 加载时自动调整图片大小

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

  //        这个一个模拟只读不是真的只读

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

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

  //  create by sl

  // ---------------------------------------------------

  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";

  }