var ie = (document.getElementById&&document.all);

function menuOn(that){	
	that.style.backgroundColor = "#FCE152";
}

function menuOff(that){
	that.style.backgroundColor = "";
}

function popImage(imgId){
	document.getElementById("divGallery").innerHTML = "<table width=100% height=100%><tr><td align=center valign=center>One Moment...</td></tr></table>";
	
	requestImage('/gallery/displayimage.aspx?id=' + imgId);

	positionImage();
	document.getElementById("divGallery").style.visibility = "visible";
}

function createRequestObject(){
	
	var xmlhttp
	
	if(ie){
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP")
	}else{
		xmlhttp = new XMLHttpRequest();
	}
	
	return xmlhttp;

}

function requestImage(imgURL){
	
	xmlhttp = createRequestObject();
	
	xmlhttp.open("GET", imgURL, true);
	xmlhttp.onreadystatechange=function() {
		if (xmlhttp.readyState==4) {
			document.getElementById("divGallery").innerHTML = xmlhttp.responseText;
		}
	}
	
	xmlhttp.send(null)
	
}

function positionImage(){
	
	var visWidth = document.body.clientWidth;
	var visHeight = document.body.clientHeight;

	document.getElementById("divGallery").style.left=visWidth/2-250;
	document.getElementById("divGallery").style.top=visHeight/2-200;

}

function hideGallery(){
	document.getElementById("divGallery").style.visibility = "hidden";
}