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*HelloAjax.js
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var xmlHttp;  
function createXMLHttpRequest() {  
    if (window.XMLHttpRequest) {  
        xmlHttp = new XMLHttpRequest();  
    }  
    else if (window.ActiveXObject) {  
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");  
    }  
}  
function prepareXML() {  
    var xml = "<skills>";  
    var options = document.getElementById("skills").childNodes;  
    for (var i = 0; i < options.length; i++) {  
        var option = options[i];  
        if (option.selected) {  
            xml = xml + "<skill>" + option.value + "<\/skill>";  
        }  
    }  
    xml = xml + "<\/skills>";  
    return xml;  
}  
function handleSkills() {  
    var xml = prepareXML();  
    var url = "Handler1.ashx?timeStamp=" + new Date().getTime();  
    createXMLHttpRequest();  
    xmlHttp.onreadystatechange = handleStateChange;  
    xmlHttp.open("POST", url);  
    xmlHttp.setRequestHeader("Content-Type", "text/xml");  
    xmlHttp.send(xml);  
} 
var xmlHttp;