function saveNodes(){
	if(nodes == null){
		deleteCookie("NODES",null, null);
		deleteCookie("NODE_PTABLES",null, null);
		deleteCookie("NODE_PKEYS",null, null);
		deleteCookie("NODE_NEGATES",null, null);
		return;
	}
	var nText = '',nPTables = '',nPKeys = '',nneg = '';
	for(var x=0;x<nodes.length;x++){
		nText+=nodes[x];
		nPTables+=nodes_ptables[x];
		nPKeys+=nodes_pkeys[x];
		nneg+=nodes_negates[x];
		if(x<nodes.length-1){nText+=",";nPTables+=",";nPKeys+=",";nneg+=",";}
	}
	setCookie("NODES",nText,null,null,null,null);
	setCookie("NODE_PTABLES",nPTables,null,null,null,null);
	setCookie("NODE_PKEYS",nPKeys,null,null,null,null);
	setCookie("NODE_NEGATES",nneg,null,null,null,null);
	setCookie("DOREGION",doRegion,null,null,null,null);
	setCookie("REGION_RA",region_ra,null,null,null,null);
	setCookie("REGION_DEC",region_dec,null,null,null,null);
	setCookie("REGION_R",region_r,null,null,null,null);
}

function loadNodes(){
	if(document.cookie == null)return;
	if(getCookie("NODES") == null)return;
	nodes = getCookie("NODES").split(",");
	nodes_ptables = getCookie("NODE_PTABLES").split(",");	
	nodes_pkeys= getCookie("NODE_PKEYS").split(",");
	nodes_negates = getCookie("NODE_NEGATES").split(",");
	doRegion = getCookie("DOREGION");
	
	region_ra = getCookie("REGION_RA");
	region_dec = getCookie("REGION_DEC");
	region_r = getCookie("REGION_R");
	for(var x=0;x<nodes.length;x++){
		if(nodes_negates[x] == 'true')
			window.document.getElementById(nodes[x]+"_xnegate").src= X_NEGATE_SELECTED;
		else
			window.document.getElementById(nodes[x]+"_xmatch").src= X_CHECK;
		
	}
	if(doRegion.indexOf('true') > -1){
		window.parent.selectRegionIcon();
	}
}

function getCookie(name)
{
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1)
    {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    }
    else
    {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
    {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}

function setCookie(name, value, expires, path, domain, secure)
{
    document.cookie= name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

function deleteCookie(name, path, domain)
{
    if (getCookie(name))
    {
        document.cookie = name + "=" + 
            ((path) ? "; path=" + path : "") +
            ((domain) ? "; domain=" + domain : "") +
            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}