// JavaScript Document
function Alert(str) {
    var msgw,msgh,bordercolor;
    msgw=550;//提示窗口的宽度
    msgh=350;//提示窗口的高度
    titleheight=25 //提示窗口标题高度
    bordercolor="#336699";//提示窗口的边框颜色
    titlecolor="#99CCFF";//提示窗口的标题颜色
    var sWidth,sHeight;
    //获取当前窗口尺寸
    sWidth = document.body.offsetWidth;
    sHeight = document.body.scrollHeight;
    //背景div
    var bgObj=document.createElement("div");
    bgObj.setAttribute('id','alertbgDiv');
    bgObj.style.position="absolute";
    bgObj.style.top="0";
    bgObj.style.background="#E8E8E8";
    bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75";
    bgObj.style.opacity="0.6";
    bgObj.style.left="0";
    bgObj.style.width = document.body.scrollWidth; //1024px //document.documentElement.clientWidth  + "px";;
    bgObj.style.height = document.body.scrollHeight; //"768px"; //document.documentElement.clientHeight + "px";
    bgObj.style.zIndex = "100000";
    document.body.appendChild(bgObj);
    //创建提示窗口的div
    var msgObj = document.createElement("div")
    msgObj.setAttribute("id","alertmsgDiv");
    msgObj.setAttribute("align","center");
    msgObj.style.background="white";
    msgObj.style.border="1px solid " + bordercolor;
    msgObj.style.position = "absolute";
    msgObj.style.left = "50%";
    msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
    //窗口距离左侧和顶端的距离 
    msgObj.style.marginLeft = "-225px";
    //窗口被卷去的高+（屏幕可用工作区高/2）-150
    msgObj.style.top = document.documentElement.scrollTop+(window.screen.availHeight/3)-150 +"px";
    msgObj.style.width = msgw + "px";
    msgObj.style.height = msgh + "px";
    msgObj.style.textAlign = "center";
    msgObj.style.lineHeight ="25px";
    msgObj.style.zIndex = "100001";
    document.body.appendChild(msgObj);
    //关闭
    var title=document.createElement("h4");
    title.setAttribute("id","alertmsgTitle");
    title.setAttribute("align","right");
	title.style.marginLeft="510";
    //title.style.margin="0";
    //title.style.padding="3px";
	title.style.cursor="pointer";
    title.style.background = bordercolor;
    title.style.filter="progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";
    title.style.opacity="0.75";
    title.style.border="1px solid " + bordercolor;
    title.style.height="18px";
    title.style.font="12px Verdana, Geneva, Arial, Helvetica, sans-serif";
    title.style.color="white";
    title.innerHTML="close";
    document.getElementById("alertmsgDiv").appendChild(title);
	
	

	//关闭事件

	document.getElementById("alertmsgTitle").onclick=function(){
		document.body.removeChild(document.getElementById("alertbgDiv"));
    document.getElementById("alertmsgDiv").removeChild(document.getElementById("alertmsgTitle"));
    document.body.removeChild(document.getElementById("alertmsgDiv"));
		}

	//读取图片大小
	var picObj=new Image();
	picObj.src=str;//"http://localhost:8066/images/indextop.jpg";//str;
	var  picWidth=picObj.width;
	var  picHeight=picObj.height;
	var tempStr111=""; 
	if(picWidth>500)
	{
		tempStr111+=(picHeight*(picWidth-500)/picWidth)+"";
		picHeight=tempStr111.substring(0,tempStr111.indexOf("."));
		//picHeight=substring(tempStr,indexOf(tempStr,"."));
		//picHeight=300;
		picWidth=500;
		}
	//picHeight=300;
	//picWidth=400;
	//提示信息
    var txt = document.createElement("p");
    txt.setAttribute("id","msgTxt");
    txt.style.margin="16px 0";
    txt.innerHTML ="<img src=\""+str+"\" width=\""+picWidth+"\" height=\""+picHeight+"\">";// picWidth+"---"+picHeight;//indexOf(tempStr111,".");//substring(tempStr111,);//
    document.getElementById("alertmsgDiv").appendChild(txt);
    //1.5秒钟后窗口自动关闭
    //window.setTimeout("closewin()",1500); 
}