<form id="requestForm">
    <table>
        <tr>
            <td width="70px">Language:</td>
            <td><select id="language" name="languageCode" onchange="loadFlows()">
            </select></td>
        </tr>
    <tr>
        <td>Flow:</td>
        <td><select id="flow" name="flowId">
        </select></td>
    </tr>
    <tr>
        <td colspan="2">
                Text:<BR /> 
                <textarea name="text" wrap="SOFT" tabindex="0" style="width: 600px; height: 200px; padding:5px"></textarea>
        </td>
    </tr>
    <tr>
        <td colspan="2"><input type="button" value="Analyze" onclick="analyze();" /></td>
    </tr>
    </table>
</form>

    function analyze() {
        $('#result').empty();

        var flow = $('#flow').val();
        if(flow == 0){
            alert("The selected flow is invalid!");
            return;
        }

        $.blockUI({
            message : '<h1>Analyzing...</h1>'
        });
        $('#result').load("analyze.do", $('#requestForm').serialize(), function(){
            $.unblockUI();
        });
    }

$.ajax({
url:'analyze.do'
,type:'POST'//////改为post看看
,data:$('#requestForm').serialize()
,success:function(){ $.unblockUI();}
,error:function(xhr){alert('出错\n'+xhr.responseText);}////////
});