function img_check () {

	if(document.getElementById("js_img")) {

		var newImg = new Image();
		newImg.src = document.getElementById("js_img").src;
		var img_h = newImg.height;
		var img_w = newImg.width;

		if(!img_h) {
			img_h = document.getElementById("js_img").height;
			img_w = document.getElementById("js_img").width;
		}

		if((img_w/4) > (img_h/3)) {
			var new_h = Math.round((455/img_w)*img_h);
			document.getElementById("js_img").style.width = '455px';
			document.getElementById("js_img").style.height = new_h+'px';
		} else {
			var new_w = Math.round((340/img_h)*img_w);
			var padding = Math.round((455-new_w)/2);
			document.getElementById("js_img").style.height = '340px';
			document.getElementById("js_img").style.width = new_w+'px';
			document.getElementById("js_img").style.marginLeft = padding+'px';
		}
		document.getElementById("js_img_link").style.display = '';
	}
}