JavaScript 獲取圖片長和寬

 

<script> var img=null; function s() { if(img)img.removeNode(true); img=document.createElement("img"); img.style.position="absolute"; img.style.visibility="hidden"; img.attachEvent("onreadystatechange",orsc); img.attachEvent("onerror",oe); document.body.insertAdjacentElement("beforeend",img); img.src=inp.value; } function oe() { alert("cant load img"); } function orsc() { if(img.readyState!="complete")return false; alert("高:"+img.offsetHeight+"/n宽:"+img.offsetWidth); } </script> <input type="file" Name="file" id="inp" value="默认值"><br><input onclick="s()" type="button" value="点我一下给出要上传图片的大小及长、宽" name="button">