/**
* Ajax¶ÔÏó
*    function functionName(reAjax,status){if(status == 200)alert(reAjax.responseText);}
*
* Àý£º1:GET
*    var myAjax=new Ajax();
*    myAjax.open("http://www.ttzx.com:88/ajax/re.php",functionName);
*    myAjax.send();
*
* Àý£º2:POST
*   var myAjax=new Ajax(); 
*   myAjax.open("http://www.ttzx.com:88/ajax/re.php",functionName);
*   myAjax.send("sendType=Post&sendValue=myDatas");
*/