call php function repeatly in javascript
<pre><code>function getTime()
    {

         var date = new Array(
        &lt;?php
            $date1 = date("Y-m-d, H:i");
            echo "new Array(\"".$date1."\")";
        ?&gt;);

        //document.write(date[0]);

        return date[0]; 

    }   
function showmychart() {

            max_time = getTime();
            min_time = getMintime(max_time);

            //document.write(max_time);
            //delete myChart;
            var c_channel = channel;
            myChart = new Drawchart(max_time, min_time,c_channel);
            myChart.showChart();

    }

    function changeSBS(){
        channel = 'sbs';
        showmychart();
    }
    function changeKBS2(){
        channel = 'kbs2';
        showmychart();
    }


    &lt;/script&gt;
    &lt;/head&gt;

    &lt;body&gt;

    &lt;center&gt;    
    &lt;div id = "header"&gt;
    &lt;/div&gt;

    &lt;div id="middle"&gt;
                &lt;input type = "button" id ="before" onclick="showBeforeChart();" value = "Before"&gt;
                &lt;object id="chart"&gt;&lt;/object&gt;
                &lt;script class="code" id="Drawchart" type="text/javascript"&gt;showmychart();&lt;/script&gt;
                &lt;input type = "button" id ="after" onclick="showAfterChart();" value = "After"&gt;
    &lt;/div&gt;
    &lt;div id = "channel_position"&gt;
    &lt;input type = "button" id ="before" onclick="changeSBS();" value = "aaa"&gt;
    &lt;input type = "button" id ="before" onclick="changeKBS2();" value = "bbb"&gt;
</code></pre>

<p>in this code, when i click aaa button or bbb button I want to update max_time in function shomychart() using function getTime(). Now, when I click the button aaa, and bbb it doesn't update, i think it doesn't call getTime() function or   in the getTime() function doesn't work... How can i solve this problem???? </p>
