function display(imgObj,src){
	var img=new Image();
	img.src=src;
	var width;
	var height;
	if(img.width<=img.height){
		width=150;
		height=200;
	}else{
		width=200;
		height=150;
	}
	imgObj.setAttribute("width",width);
	imgObj.setAttribute("height",height);
}

function changeSize(imgObj,src){
	var maxWidth=500;
	var img=new Image();
	img.src=src;
	var width=img.width;
	var height=img.height;
	if(width>maxWidth){
		var rs=parseFloat(maxWidth)/parseFloat(width);
		height=height*rs;
		width=maxWidth;
	}
	imgObj.setAttribute("width",width);
	imgObj.setAttribute("height",height);
}