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";     
	};   
} 


function emailCheck (emailStr) {

    var emailPat=/^(.+)@(.+)$/
    var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
    var validChars="\[^\\s" + specialChars + "\]"
    var quotedUser="(\"[^\"]*\")"
    var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
    var atom=validChars + '+'
    var word="(" + atom + "|" + quotedUser + ")"
    var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
    var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

    var matchArray=emailStr.match(emailPat)

    if (matchArray==null) {
        return false
    }

    var user=matchArray[1]
    var domain=matchArray[2]
    if (user.match(userPat)==null) {
        return false
    }

    var IPArray=domain.match(ipDomainPat)
    if (IPArray!=null) {
          for (var i=1;i<=4;i++) {
            if (IPArray[i]>255) {
                return false
            }
        }
        return true
    }

    var domainArray=domain.match(domainPat)
    if (domainArray==null) {
        return false
    }

    var atomPat=new RegExp(atom,"g")
    var domArr=domain.match(atomPat)
    var len=domArr.length
    if (domArr[domArr.length-1].length<2 ||
        domArr[domArr.length-1].length>4) {
       return false
    }

    if (len<2) {
       return false
    }

    return true;

} 


function periodicalRequest(request_link, tm) {   
	new Ajax.Request(request_link, {method: 'post', asynchronous : true});       
	setTimeout("periodicalRequest('"+request_link+"', "+tm+")", tm);
}   


function start_wait() {
	$('wait').update('');
	setTimeout("$('wait').update('.')", 300);
	setTimeout("$('wait').update('..')", 400);
	setTimeout("$('wait').update('...')", 500);
	setTimeout("start_wait()", 700);
}


function popup(popup_url, popup_name) {    
	window.open(popup_url, popup_name, 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=600,height=340');
}  


function resetOptions(el_id) {
	op = $(el_id).options;
	while(op.length)
		op[op.length-1] = null;	
} 


function blinkingText(el_id, color_from, color_to) {  
	$('#'+el_id).css('color', '#'+color_to);	
	setTimeout("blinkingText('"+el_id+"', '"+color_to+"', '"+color_from+"')", 500);
}