function makevisible(id)
{
    document.getElementById(id).style.visibility = 'visible';
}

function makeinvisible(id)
{
    document.getElementById(id).style.visibility = 'hidden';
}

function enable(id)
{
    document.getElementById(id).enabled = 'true';
}

function getselected(id)
{
    theElement = document.getElementById(id);
    
    toReturn = theElement.options[theElement.selectedIndex].value;

    return toReturn;
}

function CreateXmlHttpObject()
{ 
    var objXMLHttp=null;

    if (window.XMLHttpRequest)
    {
        objXMLHttp=new XMLHttpRequest();
    }

    else if (window.ActiveXObject)
    {
        objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }

    return objXMLHttp;
}

function setCookie(name,value,days) 
{
	if (days) 
    {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function getCookie(name) 
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) 
    {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function deleteCookie(name) 
{
	setCookie(name,"",-1);
}