function getElementsByClass( searchClass, domNode, tagName) {
	if (domNode == null) domNode = document;
	if (tagName == null) tagName = '*';   
	
	var el = new Array();
	var tags = domNode.getElementsByTagName(tagName);
	var tcl = " "+searchClass+" ";
	for(i=0,j=0; i<tags.length; i++) {
		var test = " " + tags[i].className + " ";
		if (test.indexOf(tcl) != -1)
			el[j++] = tags[i];
	}
	return el;
} 


function initMessageBox() {   
	var elem = $('message_box');    
	
	var root = (document.compatMode == "CSS1Compat" ? document.documentElement : document.body);
		
//	elem.style.display = 'block';  
//	elem.style.top = root.scrollTop + 200 + "px";     
	
	window.onscroll = function() {  
		elem.style.top = root.scrollTop + 200 + "px";     
	};   
}