﻿// JScript 文件


	//图片按比例缩放
	var flag=false;
	function DrawImage(ImgD,width,height){
	    var image=new Image();
	    var iwidth = width; //定义允许图片宽度
	    var iheight = height; //定义允许图片高度
	    image.src=ImgD.src;
	    if(image.width>0 && image.height>0){
	        flag=true;
	        if(image.width/image.height>= iwidth/iheight){
	            if(image.width>iwidth){ 
	                ImgD.width=iwidth;
	                ImgD.height=(image.height*iwidth)/image.width;
	            }else{
	                ImgD.width=image.width; 
	                ImgD.height=image.height;
	            }

	            ImgD.alt=image.width+"×"+image.height;
	            }
	            else{
	                if(image.height>iheight){ 
	                ImgD.height=iheight;
	                ImgD.width=(image.width*iheight)/image.height; 
	            }else{
	                ImgD.width=image.width; 
	                ImgD.height=image.height;
	            }
	            ImgD.alt=image.width+"×"+image.height;
	        }
	    }
	} 

