var flag=false;function DrawImage(ImgD,picwidth,picheight){imgw=picwidth;imgh=picheight;var image=new Image();image.src=ImgD.src;if(image.width>0 && image.height>0){flag=true;if(image.width/image.height>= imgw/imgh){if(image.width>imgw){ImgD.width=imgw;ImgD.height=(image.height*imgw)/image.width;}else{ImgD.width=image.width;ImgD.height=image.height;}}else{if(image.height>imgh){ImgD.height=imgh;ImgD.width=(image.width*imgh)/image.height;}else{ImgD.width=image.width;ImgD.height=image.height;}}}}