<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="hapday">
<meta name="Keywords" content="类型校验" />
<meta name="Description" content="类型校验" />
<title>格式校验</title>
<script type="text/javascript">
/**
* 类型校验
* @param types 类型标准，（英文状态下）逗号分隔
* @param fileName 文件名
* @return 合法返回 true，否则返回 false
*/
var typeVerify = function(types, fileName) {
if(undefined === fileName || null === fileName || '' === fileName) {
return false;
}
if(undefined === types || null === types || '' === types) {
types = 'jpg, png, gif, txt, xls';
}
var lastDotIndex = fileName.lastIndexOf('.');
if(-1 === lastDotIndex) {
return false;
}
var expandedName = fileName.substring(lastDotIndex + 1, fileName.length).toLowerCase();
var types_ = types.split(',');
for(var index = 0; index < types_.length; index++) {
var standard = types_[index].trim();
if(standard === expandedName) {
return true;
}
}
return false;
}
var materialUpload = function(){
var materialFile = window.document.getElementById('materialFile');
alert(typeVerify('jpg, png, tif', materialFile.value));
}
</script>
</head>
<body>
<input type="file" id="materialFile" />
<input type="button" value="上传" onclick="materialUpload();" />
</body>
</html>