ajax代码示例

function loadXMLDoc(idName,url,sendOut)
	{
		var xmlhttp;
		if (window.XMLHttpRequest)
		  {// code for IE7+, Firefox, Chrome, Opera, Safari
				xmlhttp=new XMLHttpRequest();
		  }
		  else
		  {// code for IE6, IE5
				xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		  }
		xmlhttp.onreadystatechange=function()
		{
			  if (xmlhttp.readyState==4 && xmlhttp.status==200)
			  {
				document.getElementById(idName).innerHTML=xmlhttp.responseText;
				}
		  }
		xmlhttp.open("POST",url,true);
		xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
		xmlhttp.send(sendOut);
	}