attachOnload = function(onloadfunction) {
    if(typeof(onloadfunction) == 'function') {
        var oldonload=window.onload;
        if(typeof(oldonload) == 'function') {
            window.onload = function() {
                oldonload();
                onloadfunction();
            }
        } else {
            window.onload = function() {
                onloadfunction();
            }
        }
    }
}

var resizeFunctions = new Array();
resizeFunction = function() {
    for(i in resizeFunctions) {
        resizeFunctions[i]();
    }
}
window.onresize = resizeFunction;

attachOnresize = function(onresizefunction) {
    if(typeof(onresizefunction) == 'function') {
        resizeFunctions[resizeFunctions.length] = onresizefunction;
    }
}

getIEVersionNumber = function() {
    var ua = navigator.userAgent;
    var MSIEOffset = ua.indexOf("MSIE ");
    if (MSIEOffset == -1) {
        return -1;
    } else {
        return parseFloat(ua.substring(MSIEOffset + 5, ua.indexOf(";", MSIEOffset)));
    }
}
var ieVersion = getIEVersionNumber();