//建立xmlHttp对象
function creatXMLHttp()
{
try{
	xmlHttp=new XMLHttpRequest;
	}catch(e1){
		try{
			xmlHttp=new ActiveXObject("MSXML2.XMLHTTP");
		}catch(e2){
			try{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}catch(e3){
				xmlHttp=null;
				alert("您的浏览器不支持AJAX.");
				}
			}
	}
}
//错误处理，复制留言内容至剪切板
function ErrorToSaveContent()
{
	window.clipboardData.setData("text","%FxLevaeContent%"+Content+"%FxLevaeContent%"); 
}
//显示/隐藏加载状态
function showLoadLayer(state)
{
	if(state==1){
		 document.getElementById("LoadLayer").style.visibility = "visible";
	}else{
		 document.getElementById("LoadLayer").style.visibility = "hidden";
	}
}
//获取对象
function getObj(obj)
{
	return document.getElementById(obj);
}
//查看是否正在交互
function IsPosting()
{
	if(xmlHttp.readyState==3){
		alert("正在提交");
	}
}
//查询字符串中是否含有指定字符串
function countInstances(mainStr, subStr)
{
	var count = 0;
	var offset = 0;
	do
	{
		offset = mainStr.indexOf(subStr, offset);
		if(offset != -1)
		{
			count++;
			offset += subStr.length;
		}
	}while(offset != -1)
	return count;
}