摘要：
1 var contextMap = canvasMap.getContext('2d');2 var imagedataMap=contextMap.getImageData(0,0,canvasMap.width,canvasMap.height);3 var contextPrint = canvasPrint.getContext('2d');4 contextPrint.putImageData(imagedataMap, 0, 0); 在本地运行这段代码时，就会报SECURITY_ERR:DOM Exception 18错误，至于原因，因为本地... 阅读全文
