js程式碼:

<script>
	function download() {
	<span style="white-space:pre">	</span>var canvas = document.createElement('canvas');			
	<span style="white-space:pre">	</span>var ctx=canvas.getContext("2d");
	<span style="white-space:pre">	</span>var awindow=new Image();
	<span style="white-space:pre">	</span>awindow.src="httP://";//這地方輸入要儲存的圖片地址;
<span style="white-space:pre">	</span><span style="white-space:pre">	</span>canvas.width=awindow.width;//圖片的寬度
	<span style="white-space:pre">	</span>canvas.height=awindow.height;//圖片的高度
	<span style="white-space:pre">	</span>ctx.drawImage(awindow,0,0);//畫布上新增圖片內容
	<span style="white-space:pre">	</span>var dt = canvas.toDataURL('image/png');//儲存圖片格式,固定的格式
	<span style="white-space:pre">	</span>this.href = dt;
	};
	downloadLnk.addEventListener('click', download, false);
</script>
 

<span style="font-size:14px;"><a id="downloadLnk" download="saveImage.jpg";>Save Image</a></span>