html 图片预览

html代码：

css：

.back {
	display: none;
	position: fixed;
	top: 0%;
	left: 0%;
	width: 100%;
	height: 100%;
	background-color: black;
	z-index: 1000;
	filter: alpha(opacity = 70);
	text-align: center;
}

.center {
	width: 80%;
	margin: 5% auto;
	z-index: 1001;
	height: 80%;
	width: 80%;
	margin: 5% auto;
}

js:

function prewImg(imgEle){
	$(".back").css("display","block");
	$("#prewImg").attr("src",$(imgEle).attr("src"));
}
function canclePrew(){
	$(".back").css("display","none");
	$("#prewImg").attr("src","")
}

完整代码：