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;
}
}
function CheckImg()
{
if(document.getElementById(“PhotoPreviewImg”).fileSize==-1||document.getElementById(“PhotoPreviewImg”).fileSize>5000000)
{
document.getElementById(“File1″).disabled=false;
//document.getElementById(“PhotoPreviewImg”).className=’imgPrev0′;
document.getElementById(“PhotoPreviewImg”).src=”";
LoadEmptyImage ();
alert(“您选择文件超过5M，无法上传！”);
return false;
}
else
{
document.getElementById(“File1″).disabled=false;
}
document.getElementById(“PhotoPreviewImg”).className=”;
var originwidth=document.getElementById(“PhotoPreviewImg”).width*10;
var originheight=document.getElementById(“PhotoPreviewImg”).height*10;
var scale=originwidth/originheight;
document.getElementById(“PhotoPreviewImg”).style.top=20;
document.getElementById(“PhotoPreviewImg”).style.left=20;
if(scale>0.8)
{
document.getElementById(“PhotoPreviewImg”).className=’imgPrev2′;
var largerheight=document.getElementById(“PhotoPreviewImg”).height;
var leftover=(150-largerheight)/2;
document.getElementById(“PhotoPreviewImg”).style.marginLeft=2;
document.getElementById(“PhotoPreviewImg”).style.marginTop=leftover;
}
else
{
document.getElementById(“PhotoPreviewImg”).style.marginTop=2;
document.getElementById(“PhotoPreviewImg”).className=’imgPrev1′;
var largerwidth=document.getElementById(“PhotoPreviewImg”).width;
var leftover=(120-largerwidth)/2;
document.getElementById(“PhotoPreviewImg”).style.marginLeft=leftover;
}
return true;
}\n