// JavaScript Document

//图片缩放函数
//param
//ImgD:图片对象; FitWidth:适当的宽度; FitHeight:图片高度
//调用onload="javascript:DrawImage(this,200,200)"
function DrawImage(ImgD,FitWidth,FitHeight)
{
     var image=new Image();
	 image.src=ImgD.src;
	 if(image.width>0 && image.height>0)
	 {
	    if(image.width/image.height>= FitWidth/FitHeight)
		{  
		       if(image.width>FitWidth)
		      { ImgD.width=FitWidth;
			    ImgD.height=(image.height*FitWidth)/image.width;              }
			else
			    {
				   ImgD.width=image.width; 
			       ImgD.height=image.height;
				}
        }
	   else
	   {
	     if(image.height>FitHeight)
		  {
		    ImgD.height=FitHeight;
			ImgD.width=(image.width*FitHeight)/image.height;          }
	     else
		 {
		    ImgD.width=image.width;
			ImgD.height=image.height;
		 }
	   }
	 } 
}