var ie4 = document.all;
var ns4 = document.layers;
var ns6 = document.getElementById && !document.all; 

function setCookie(c_name,value,expiredays)
{
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" : ";expires="+exdate.toGMTString()+";path=/");
}

function getCookie(c_name)
{
	if (document.cookie.length>0)
	{
		c_start=document.cookie.indexOf(c_name + "=");
		if (c_start!=-1)
		{ 
			c_start=c_start + c_name.length+1; 
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) c_end=document.cookie.length;
				return unescape(document.cookie.substring(c_start,c_end));
		} 
	}
	return "";
}


function hideWaitMessageBg(){
	hideElement('wait_message_bg');
}

function displayWaitMessageBg(){
	displayElement('wait_message_bg');
}


function hideElement(elementId){
	var wait_div=document.getElementById(elementId);
	if(wait_div){
		wait_div=wait_div.style;
		wait_div.display='none';
		wait_div.visibility='hidden';
	}
}

function displayElement(elementId){
	var wait_div=document.getElementById(elementId);
	if(wait_div){
		wait_div=wait_div.style;
		wait_div.display='block';
		wait_div.visibility='visible';
	}
}

function hideWaitMessage(){
	makeUnScrollingBody();
	hideElement('wait_message');
	hideWaitMessageBg();
}

function displayWaitMessage(){
	makeScrollingBody();
	displayElement('wait_message');
	displayWaitMessageBg();
}


//modify styles for IE
function makeScrollingBody(){
	if(ie4 && olderBowser){
		var html = document.getElementsByTagName('html');
		var bodyElem = document.getElementsByTagName('body');
		var picturePlaceholderDiv = document.getElementById('picturePlaceholderDiv').style;
		var wait_message_bg = document.getElementById('wait_message_bg').style;
		
		picturePlaceholderDiv.position='absolute';
		wait_message_bg.position='absolute';
		
		html[0].style.setAttribute('height','100%');
		html[0].style.setAttribute('overflow','auto');
		bodyElem[0].style.setAttribute('height','100%');
		bodyElem[0].style.setAttribute('overflow','auto');
	}
}

function makeUnScrollingBody(){
	if(ie4 && olderBowser){
		var html = document.getElementsByTagName('html');
		var bodyElem = document.getElementsByTagName('body');
		var picturePlaceholderDiv = document.getElementById('picturePlaceholderDiv').style;
		var wait_message_bg = document.getElementById('wait_message_bg').style;
		
		picturePlaceholderDiv.position='';
		wait_message_bg.position='';
		
		html[0].style.setAttribute('height','');
		html[0].style.setAttribute('overflow','');
		bodyElem[0].style.setAttribute('height','');
		bodyElem[0].style.setAttribute('overflow','');
	}
}


function emulate_disabled(e) {
	for (var i=0, option; option = e.options[i]; i++) {
		if (option.disabled) {
			option.style.color = "graytext";
		}
		else {
			option.style.color = "menutext";
		}
	}
}