function query_content(content_name) {
	var xmlHttpReq = false;
	var self = this;
	// Mozilla/Safari
	if (window.XMLHttpRequest)
		self.xmlHttpReq = new XMLHttpRequest();
	// IE
	else if (window.ActiveXObject)
		self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
	self.xmlHttpReq.open('POST', 'get_content.php', true);
	self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	self.xmlHttpReq.onreadystatechange = function(){
		if(self.xmlHttpReq.readyState == 4)
			if(document.getElementById('textContent'))
				document.getElementById('textContent').innerHTML = self.xmlHttpReq.responseText;
	}
	self.xmlHttpReq.send('content_name='+content_name);
}