var error_ct = 0;
function openGrWindow(theURL,winName,gravure_id) {
	//初期表示画像
	var img_obj = new Image();
	var img_path = '/img/gravure/'+gravure_id+'/gravure_p0.jpg';
	var margin = 60;
	//URL設定
	img_obj.src = img_path;
	
	if (img_obj.width != 0 || img_obj.height != 0) {
		error_ct = 0;
		if(navigator.userAgent.indexOf("MSIE") != -1){ // for IE
			//for IE
			width  = img_obj.width;
			height = img_obj.height + margin;
			
		} else { 
			//for other
			//var margin = window.outerHeight - window.innerHeight;
			width  = img_obj.width;
			height = img_obj.height + margin;
			
		}
		window.open(theURL,"",'left=0,top=0,resizable=yes,width='+width+',height='+height+',toolbar=no,menubar=no,scrollbars=yes');

	} else {
		error_ct++;
		if(error_ct==2){
			alert("画像がありません");
			error_ct = 0;
		}
	}
}