/*
功能：图片等比例缩放
目标:ImgTag
图片宽度:FitWidth
图片高度:FitHeight
*/

function ResizePic(ImgTag,FitWidth,FitHeight)
{
	var image = new Image();
	image.src = ImgTag.src;
	if(image.width>0 && image.height>0)
	{
		if(image.width/image.height >= FitWidth/FitHeight){
			if(image.width > FitWidth){
				ImgTag.width = FitWidth;
				ImgTag.height = (image.height*FitWidth)/image.width;
			}
			else{ 
				ImgTag.width = image.width;
				ImgTag.height = image.height;
			}
		}
		else{
			if(image.height > FitHeight){
				ImgTag.height = FitHeight;
				ImgTag.width = (image.width*FitHeight)/image.height;
			}
			else{
				ImgTag.width = image.width; 
				ImgTag.height = image.height;
			}
		}
	}
}