JavaScript上传的文件
<script language="JavaScript">
<!--
//检查上传物件 checkFileUpload(表单名称,档案类型,是否需要上传,档案大小,图片最小宽度,图片最小高度,图片最大宽度,图片最大高度,储存宽度的表单名称,储存高度的表单名称)
function checkFileUpload(form,extensions,requireUpload,sizeLimit,minWidth,minHeight,maxWidth,maxHeight,saveWidth,saveHeight) {
document.MM_returnValue = true;
if (extensions != \'\') var re = new RegExp("\.(" + extensions.replace(/,/gi,"|") + ")$","i");
for (var i = 0; i<form.elements.length; i++) {
field = form.elements[i];
if (field.type.toUpperCase() != \'FILE\') continue;
if (field.value == \'\') {
if (requireUpload) {alert(\'请选取上传的文件！\');document.MM_returnValue = false;field.focus();break;}
} else {
if(extensions != \'\' && !re.test(field.value)) {
alert(\'这个文件不符合上传的类型！\n只有以下的类型才允许上传： \' + extensions + \'。\n请依规定选取新的上传文件。\');
document.MM_returnValue = false;field.focus();break;
}
document.PU_uploadForm = form;
re = new RegExp(".(gif|jpg|png|bmp|jpeg)$","i");
if(re.test(field.value) && (sizeLimit != \'\' || minWidth != \'\' || minHeight != \'\' || maxWidth != \'\' || maxHeight != \'\' || saveWidth != \'\' || saveHeight != \'\')) {
setTimeout(\'if (document.MM_returnValue) document.PU_uploadForm.submit()\',500);
checkImageDimensions(field.value,sizeLimit,minWidth,minHeight,maxWidth,maxHeight,saveWidth,saveHeight);
} } }
}
//-->
</script>
//置于<body>里面
onSubmit="checkFileUpload(this,\'GIF,JPG,JPEG,PNG,BMP\',true,\'\',\'\',\'\',\'\',\'\',\'\',\'\');return document.MM_returnValue"