//----生成XMLHttpRequest对象--------------------------------------------------
function createXMLHttpRequest()
{
	try
	{
		request = new XMLHttpRequest();
	}
	catch(trymicrosoft)
	{
		try
		{
			request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(othermicrosoft)
		{
			try
			{
				request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (failed)
			{
				request = false;
			}
		}
	}
	return 	request;
}


//----生成XMLDOM对象--------------------------------------------------
function createXmlDom()
{
	if(window.ActiveXObject)
	{
		var xmlDom = new ActiveXObject("Microsoft.XMLDOM");
	}
	else
	{
		if (document.implementation && document.implementation.createDocument)
		{
			var xmlDom = document.implementation.createDocument("", "doc", null);
		}
	}
	xmlDom.async = false;
	xmlDom.preserveWhiteSpace = true;
	return xmlDom;
}


function getColValue(colName)
{
	var list=document.getElementsByTagName("input");
	var val = "";
	for(var i=0; i < list.length; i++)
	{
		if(list[i].type == "radio")
		{
			if(list[i].name == colName)
			{
				if(list[i].checked)
				{
					val = val + list[i].value;
				}
			}
		}
	}
	return val;
}

//----发送XMLHttpRequest信息--------------------------------------------------

function sendXMLHttp(url, getXMLHttpFun)
{
	var request = createXMLHttpRequest();
	request.open("GET", url, false);
	request.onreadystatechange = getXMLHttpFun;
	request.send(null);
}

//----删除控件--------------------------------------------------
function delControl(list)
{
	var i=list.childNodes.length;
	var end = 0;
	var alt = "";
	while(  i >= end )
	{
		var  s=list.childNodes[i];
		try {list.removeChild(s);}
		catch(ex){}
		i--;
	}
	return alt;
}