function changeStart(flag ,num) {
	var star1 = document.getElementById(flag+"1");
	var star2 = document.getElementById(flag+"2");
	var star3 = document.getElementById(flag+"3");
	var star4 = document.getElementById(flag+"4");
	var star5 = document.getElementById(flag+"5");
	var comment = document.getElementById("s_"+flag);
	var hid = document.getElementById(flag);
	switch(num) {
		case 1:
			star1.src="images/star1.gif";
			star2.src="images/star0.gif";
			star3.src="images/star0.gif";
			star4.src="images/star0.gif";
			star5.src="images/star0.gif";
			comment.innerHTML="(差)";
			comment.value=1;
			hid.value=1;
			break;
		case 2:
			star1.src="images/star1.gif";
			star2.src="images/star1.gif";
			star3.src="images/star0.gif";
			star4.src="images/star0.gif";
			star5.src="images/star0.gif";
			comment.innerHTML="(一般)";
			comment.value=2;
			hid.value=2;
			break;
		case 3:
			star1.src="images/star1.gif";
			star2.src="images/star1.gif";
			star3.src="images/star1.gif";
			star4.src="images/star0.gif";
			star5.src="images/star0.gif";
			comment.innerHTML="(好)";
			comment.value=3;
			hid.value=3;
			break;
		case 4:
			star1.src="images/star1.gif";
			star2.src="images/star1.gif";
			star3.src="images/star1.gif";
			star4.src="images/star1.gif";
			star5.src="images/star0.gif";
			comment.innerHTML="(很好)";
			comment.value=4;
			hid.value=4;
			break;
		case 5:
			star1.src="images/star1.gif";
			star2.src="images/star1.gif";
			star3.src="images/star1.gif";
			star4.src="images/star1.gif";
			star5.src="images/star1.gif";
			comment.innerHTML="(非常好)";
			comment.value=5;
			hid.value=5;
			break;
	}
	setComment();
}
function setComment() {
	var allComment=document.getElementById("allComment");
	var service=document.getElementById("s_service");
	var taste=document.getElementById("s_taste");
	var area=document.getElementById("s_area");
	var cost=document.getElementById("s_cost");
	var a=parseInt(service.value);
	var b=parseInt(taste.value);
	var c=parseInt(area.value);
	var d=parseInt(cost.value);
	var count=(a+b+c+d);
	var com="";
	if(1<=count&&count<=4) {
		com="差";
	} else if(5<=count&&count<=8) {
		com="一般";
	} else if(9<=count&&count<=12) {
		com="好";
	} else if(13<=count&&count<=16) {
		com="很好";
	} else if(17<=count&&count<=20) {
		com="非常好";
	}
	allComment.innerHTML=com;
	document.getElementById("msg_allComment").innerHTML="";
}

function createStar(startNum) {alert(startNum);
	var img = document.createElement("img");
	img.src="images/star1.gif";
	return img;
}