图片上传预览
function setImagePreview() { var docObj = document.getElementById("doc"); var fileName = docObj.value; 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 = '120px'; imgObjPreview.style.height = '150px'; imgObjPreview.src = docObj.files[0].getAsDataURL(); } 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 = "120px"; localImagId.style.height = "150px"; //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; }