//C# 代码：
//DeleteOptionValueRequest request = new DeleteOptionValueRequest();
//request.OptionSetName = "new_year";
//request.Value = http://www.mamicode.com/2008;
//DeleteOptionValueResponse response = (DeleteOptionValueResponse)service.Execute(request);

//js例子
function demo() {
    //属性名称
    var attrName = "new_year";
    //值
    var value = http://www.mamicode.com/2008;

    deleteOptionValue(attrName, value);
}

function deleteOptionValue(attrName,value) {
    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:DeleteOptionValueRequest‘ 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>Value</b:key>";
    request += "<b:value i:type=‘c:int‘ xmlns:c=‘http://www.w3.org/2001/XMLSchema‘>"+ value +"</b:value>";
    request += "</a:KeyValuePairOfstringanyType>";
    request += "<a:KeyValuePairOfstringanyType>";
    request += "<b:key>OptionSetName</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>DeleteOptionValue</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";
}
//执行请求
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);
}