Question

关于js代码变为jquery

function setImagePreview(avalue) {
var docObj=document.getElementById("doc");

var imgObjPreview=document.getElementById("preview");
if(docObj.files &&docObj.files[0])
{
//火狐下，直接设img属性
imgObjPreview.style.display = 'block';
imgObjPreview.style.width = '150px';
imgObjPreview.style.height = '180px';
//imgObjPreview.src = docObj.files[0].getAsDataURL();

//火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式
imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);
}
else
{
//IE下，使用滤镜
docObj.select();
var imgSrc = document.selection.createRange().text;
var localImagId = document.getElementById("localImag");
//必须设置初始大小
localImagId.style.width = "150px";
localImagId.style.height = "180px";
//图片异常的捕捉，防止用户修改后缀来伪造图片
try{
localImagId.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
}
catch(e)
{
alert("您上传的图片格式不正确，请重新选择!");
return false;
}
imgObjPreview.style.display = 'none';
document.selection.empty();
}
return true;
}
这段代码我需要改变为jquery来执行 请问应该怎么改 跪求代码

Answer 1

var docObj=document.getElementById("doc"); // var docObj = $("#doc") ;

var imgObjPreview=document.getElementById("preview"); var imgObjPreview=$("#preview")
if(docObj.files &&docObj.files[0])
{
imgObjPreview.css({ display: "#block", width: "150px",height:"180px",src: docObj.files[0].getAsDataURL()});

//火狐下，直接设img属性 imgObjPreview.css({ display: "#block", width: "150px",height:"180px",src: docObj.files[0].getAsDataURL()});
imgObjPreview.style.display = 'block'; //imgObjPreview.
imgObjPreview.style.width = '150px';
imgObjPreview.style.height = '180px';
//imgObjPreview.src = docObj.files[0].getAsDataURL();
//后面的自己照着改 多看看手册

追问

常规的知道 主要是localImagId.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;