//CODE DEVELOPED BY OPENDOC 2005 - WWW.OPENDOC.IT//
var http_request = false;

function makeRequest(url,user_func) {

	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
		} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	
	if (!http_request) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange = user_func;
	http_request.open('GET', url, true);
	http_request.send(null);

}

function readInitContents(){
	if (http_request.readyState == 4) {	
		if (http_request.status == 200) {
			var xmldoc = http_request.responseXML;
			var document_temp=xmldoc.getElementsByTagName('Document');
			var root_node = xmldoc.getElementsByTagName('Image');
			dimIMGOrigx=root_node[0].getAttribute('width');
			dimIMGOrigy=root_node[0].getAttribute('height');
			dimOrigx=dimIMGOrigx;
			dimOrigy=dimIMGOrigy;
			if (document_temp.length==0){
				num_pages=1;
			}else{
				num_pages=document_temp[0].getAttribute('numpages');
			}
			initSystemPan();
		} else {
			alert('There was a problem with the request.');
		}
	}
}

function changePageContents(){
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			var xmldoc = http_request.responseXML;
			var document_temp=xmldoc.getElementsByTagName('Document');
			var root_node = xmldoc.getElementsByTagName('Image');
			dimIMGOrigx=root_node[0].getAttribute('width');
			dimIMGOrigy=root_node[0].getAttribute('height');
			if (document_temp==undefined){
				num_pages=1;
			}else{
				num_pages=document_temp[0].getAttribute('numpages');
			}
			change_page();
		} else {
			alert('There was a problem with the request.');
		}
	}
}