function PreviewImage(x)
{
//var x = document.getElementById('File1');
            var xid=x.id+"";
var index=xid.substr(xid.length-1,1);
if(!x || !x.value)
{
return false;
}
var patn = /\.jpg$|\.jpeg$|\.bmp$|\.gif$/i;
try
{
var obj = document.getElementById('PhotoPreviewImg'+index);
var barType=index;
//默认普通标题图
                var width=120;
var height=80;
if (barType==2) //首页标题图
                {
width=120;
height=90;
}
else if (barType==3) //焦点图
                {
width=320;
height=240;
}
if(patn.test(x.value))
{
var prvImg = "<img src='file://localhost/" + x.value + "' style='width: "+ width +"px; height: "+ height +"px; border: 1;' />";
var prvImgsrc = 'file://localhost/' + x.value;
                    document.getElementById("PhotoPreviewImg"+index).innerHTML=prvImg;
//setTimeout('CheckImg()',300);
                    //imgwh = new Image();
                    //imgwh.src = "file://localhost/" + x.value;
                    //CheckImg();
                    }
else
{
alert("您选择的似乎不是图像文件");
return false;
}
}
catch(e)
{
alert("您选择文件无法预览，或网络故障无法上传，请稍候再试！");
return false;
}
}