//send rate to ajax page
function send_rate(x,y)
{
	document.getElementById("rate").innerHTML="<span lang='en-us'></span>جاري ارسال التقيم</div>";
	xmlhttp.open("GET","rate.php"+"?group_id="+x+"&rate_value="+y);
	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			document.getElementById("rate").innerHTML = xmlhttp.responseText;
		}
	}
	xmlhttp.send(null);
}

//change star image on mouse over
function change_img(img_id,text)
{
	for(i=1;i<=img_id;i++)
	{
		document.getElementById(i).src="images/star.png";
	}
	document.getElementById("rate_text").innerHTML=text;
}

//back star image 
function back_img(x)
{
	for(i=1;i<=x;i++)
	{
		document.getElementById(i).src="images/blackstar.png";
	}
	document.getElementById("rate_text").innerHTML="";
}