function roll(img_name, img_src)
{    
    document[img_name].src = img_src;
}

var xmlhttp

function setselection(cid) {
    
    xmlhttp = GetXmlHttpObject();
    if (xmlhttp == null) {
        alert("Your browser does not support XMLHTTP!");
        return;
    }
    var url = "setcolor.aspx";
    url = url + "?cid=" + cid;    
    xmlhttp.onreadystatechange = stateChanged;
    xmlhttp.open("GET", url, true);
    xmlhttp.send(null);
}

function stateChanged() {
    //alert("test");
    if (xmlhttp.readyState == 4) {
        document.getElementById("_tdSelection").innerHTML = xmlhttp.responseText;
    }
}

function GetXmlHttpObject() {
    if (window.XMLHttpRequest) {
        // code for IE7+, Firefox, Chrome, Opera, Safari
        return new XMLHttpRequest();
    }
    if (window.ActiveXObject) {
        // code for IE6, IE5
        return new ActiveXObject("Microsoft.XMLHTTP");
    }
    return null;
}