var width = 0;
var bIE = (String(typeof(document.all)) != "undefined");
var img1 = new Image(); img1.src = '/design/img/h_img1.jpg';
var img2 = new Image(); img2.src = '/design/img/h_img2.jpg';
var img3 = new Image(); img3.src = '/design/img/h_img3.jpg';
var inow = 3;

function fresize(){
	var ijn =0;
	if (bIE)	width = document.body.offsetWidth;
	else			width = window.innerWidth;
	width = width - 20;
	if(width<840 && inow!=1) {
		document.getElementById('h_img').src = img1.src;
		inow = 1;
	}	else {
		if(width>840 && width<950 && inow!=2) {
			document.getElementById('h_img').src = img2.src;
			inow = 2;
		} else {
			if(width>950 && inow!=3) {
				document.getElementById('h_img').src = img3.src;
				inow = 3;
			}
		}
	}
	
}