//'-------------------------------------------------------------------------------------------------------------------------
//'图片自动缩小
//'例如：ResizeImage(this,100,80)
//'MaxW 最大宽 MaxH 最大高
//'-------------------------------------------------------------------------------------------------------------------------
var imageObject;
function ResizeImage(obj, MaxW, MaxH)
{
	if (obj != null) imageObject = obj;
	var state=imageObject.readyState;
	var oldImage = new Image();
	oldImage.src = imageObject.src;
	var dW=oldImage.width; var dH=oldImage.height;
	if(dW>MaxW || dH>MaxH) {
		a=dW/MaxW; b=dH/MaxH;
		if(b>a) a=b;
		dW=dW/a; dH=dH/a;
	}
}