DIV CSS 佈局教程網

 DIV+CSS佈局教程網 >> 網頁腳本 >> JavaScript入門知識 >> 關於JavaScript >> 限制圖片上傳長寬的JavaScript代碼
限制圖片上傳長寬的JavaScript代碼
編輯:關於JavaScript     

<html>
<head>
<title>Upload Image</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<form name="IUpload" action="upfile.asp" method="post">
<p><input type="file" name="picsrc" size="40" >
<input type="button" value="上載" ></p></form>
<p><img name="picshow" src="/UploadPic/2007-4/200742617739984.gif" title="圖像預覽"></p>
</body>
</html>

<SCRIPT LANGUAGE="javascript">
<!--
function imgExceedSize(w,h){
if(!document.IUpload.picsrc.value==""){
if(picshow.width>w||picshow.height>h){
alert("圖像尺寸:"+picshow.width+"X"+picshow.height+"。\\n圖像尺寸過大!你只能上傳尺寸為 "+w+"×"+h+"的圖像,請重新浏覽圖片!");
return true;
}else{
return false;
}
}else{
return true;
}
}

function detect(){
var ok=imgExceedSize(50,50);
if(ok){
document.IUpload.reset();
}else{
document.IUpload.submit();
}
}

//-->
</SCRIPT>

XML學習教程| jQuery入門知識| AJAX入門| Dreamweaver教程| Fireworks入門知識| SEO技巧| SEO優化集錦|
Copyright © DIV+CSS佈局教程網 All Rights Reserved