// JavaScript Document
//µÈ±ÈÀýËõ·Å
function resizePic(obj,max_w){
	var image = new Image();
	image.src = obj.src;
	var new_height= 0 ;
	var new_width = 0;
	var ratio = image.width/image.height;
	if(ratio >= 1){
		if(image.width > max_w){
			new_width = max_w;
			new_height = new_width/ratio;
		} else {
			new_width = image.width;
			new_height = image.height;	
		}
	} else if(ratio < 1){
		if(image.height > max_w){
			new_height = max_w;
			new_width = new_height*ratio;
		} else {
			new_height = image.height;
			new_width = image.width;
		}
	}
	obj.width = new_width;
	obj.height = new_height;
}