//C# 代码：
//DeleteOptionSetRequest request = new DeleteOptionSetRequest();
//request.Name = "new_year";
//DeleteOptionSetResponse response = (DeleteOptionSetResponse)service.Execute(request);

//js样例
function demo() {
    //属性名称
    var attrName = "new_year";

    deleteOption(attrName);
}

function deleteOption(attrName) {
    var request = "<s:Envelope xmlns:s=‘http://schemas.xmlsoap.org/soap/envelope/‘>";
    request += "<s:Body>";
    request += "<Execute xmlns=‘http://schemas.microsoft.com/xrm/2011/Contracts/Services‘ xmlns:i=‘http://www.w3.org/2001/XMLSchema-instance‘>";
    request += "<request i:type=‘a:DeleteOptionSetRequest‘ xmlns:a=‘http://schemas.microsoft.com/xrm/2011/Contracts‘>";
    request += "<a:Parameters xmlns:b=‘http://schemas.datacontract.org/2004/07/System.Collections.Generic‘>";
    request += "<a:KeyValuePairOfstringanyType>";
    request += "<b:key>Name</b:key>";
    request += "<b:value i:type=‘c:string‘ xmlns:c=‘http://www.w3.org/2001/XMLSchema‘>"+ attrName +"</b:value>";
    request += "</a:KeyValuePairOfstringanyType>";
    request += "</a:Parameters>";
    request += "<a:RequestId i:nil=‘true‘ />";
    request += "<a:RequestName>DeleteOptionSet</a:RequestName>";
    request += "</request>";
    request += "</Execute>";
    request += "</s:Body>";
    request += "</s:Envelope>";

    execSoap(request);
}

//获取服务地址
function getWebUrl() {
    var serverUrl = Xrm.Page.context.getServerUrl();
    if (serverUrl.match(/\/$/)) {
        serverUrl = serverUrl.substring(0, serverUrl.length - 1);
    }
    return serverUrl + "/XRMServices/2011/Organization.svc/web";
}
//运行请求
function execSoap(request) {
    var ajaxRequest = new XMLHttpRequest();
    ajaxRequest.open("POST", getWebUrl(), true)
    ajaxRequest.setRequestHeader("Accept", "application/xml, text/xml, */*");
    ajaxRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
    ajaxRequest.setRequestHeader("SOAPAction", "http://schemas.microsoft.com/xrm/2011/Contracts/Services/IOrganizationService/Execute");
    ajaxRequest.send(request);
}