var xmlhttp = false;
//Check if we are using IE.
try {
//If the Javascript version is greater than 5.
	xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");	
} catch (e) {
	//If not, then use the older active x object.
	try {
		//If we are using Internet Explorer.
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");		
	} catch (E) {
		//Else we must be using a non-IE browser.
		xmlhttp = false;
	}
}
//If we are using a non-IE browser, create a javascript instance of the object.
if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
	xmlhttp = new XMLHttpRequest();	
}

function make_request(server_page, objID) {
	var obj = document.getElementById(objID);
	xmlhttp.open("GET", server_page);
	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {		
			setInnerHTML(obj, xmlhttp.responseText);
		}		
	}
	xmlhttp.send(null);
}

function msg_preview(form_name) {
    make_request("forum.misc.php?action=preview&message="+document.forms[form_name].post.value, "preview");
}

function setInnerHTML(element, toValue) {
	// IE has this built in...
	if (typeof(element.innerHTML) != 'undefined')
		element.innerHTML = toValue;
	// Otherwise, try createContextualFragment().
	else {
		var range = document.createRange();
		range.selectNodeContents(element);
		range.deleteContents();
		element.appendChild(range.createContextualFragment(toValue));
	}
}