Because the project needs! Need script to judge size and file type on client! I find information on the Internet to find a good hard work! Simply write yourself a and test file upload size limit An example, compatible with IE6,IE7,IE8, Google Chrome,ff and other browsers
Copy Code code as follows:
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<script type= "Text/javascript" >
var Isie =/msie/i.test (navigator.useragent) &&!window.opera;
function Filechange (target,id) {
var fileSize = 0;
var filetypes =[". jpg", ". png", ". rar", "TXT", ". zip", ". Doc", ". ppt", ". xls", ". pdf", ". docx", ". xlsx"];
var filepath = Target.value;
var filemaxsize = 1024*2;//2m
if (filepath) {
var isnext = false;
var fileend = filepath.substring (Filepath.indexof ("."));
if (filetypes && filetypes.length>0) {
for (var i =0; i<filetypes.length;i++) {
if (filetypes[i]==fileend) {
Isnext = true;
Break
}
}
}
if (!isnext) {
Alert ("Does not accept this file type!") ");
Target.value = "";
return false;
}
}else{
return false;
}
if (Isie &&!target.files) {
var filePath = Target.value;
var filesystem = new ActiveXObject ("Scripting.FileSystemObject");
if (!filesystem.fileexists (FilePath)) {
Alert ("Attachment does not exist, please re-enter!") ");
return false;
}
var file = Filesystem.getfile (FilePath);
fileSize = file. Size;
} else {
FileSize = target.files[0].size;
}
var size = filesize/1024;
if (size>filemaxsize) {
Alert ("Attachment size cannot be greater than" +filemaxsize/1024+ "M!) ");
Target.value = "";
return false;
}
if (size<=0) {
Alert ("Attachment size cannot be 0m! ");
Target.value = "";
return false;
}
}
</script>
<body>
<input type= "File" Name= "Contractfilename" style= "width:500px" onchange= "Filechange" (this); " />
</body>
