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代碼如下：
<html><br /><head><br /><title>Upload Image</title><br /><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><br /></head><br /><body bgcolor="#FFFFFF" text="#000000"><br /><form name="IUpload" action="upfile.asp" method="post"><br /><p><input type="file" name="picsrc" size="40" onchange="picshow.src=document.IUpload.picsrc.value"><br /><input type="button" value="上傳" onclick="detect()"></p></form><br /><p><img name="picshow" src="http://51js.1000box.net/pics/face/19.gif" title="映像預覽"></p><br /></body><br /></html></p><p><SCRIPT LANGUAGE="JavaScript"><br /><!--<br />function imgExceedSize(w,h){<br />if(!document.IUpload.picsrc.value==""){<br />if(picshow.width>w||picshow.height>h){<br />alert("映像尺寸："+picshow.width+"X"+picshow.height+"。\\n映像尺寸過大！你只能上傳尺寸為 "+w+"×"+h+"的映像，請重新瀏覽圖片！");<br />return true;<br />}else{<br />return false;<br />}<br />}else{<br />return true;<br />}<br />}</p><p>function detect(){<br />var ok=imgExceedSize(50,50);<br />if(ok){<br />document.IUpload.reset();<br />}else{<br />document.IUpload.submit();<br />}<br />}</p><p>//--><br /></SCRIPT>
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