jq 小笔记,上传判断其格式
<script type="text/javascript"> jQuery(function () { var SpanShow = function () { var refNo = jQuery("#txtOrderRefNo").val(); var uploadfile = jQuery("#FileAwSizeUpload").val(); if (refNo == "" || refNo == null) { jQuery("#s_order").show(); return false; } if (uploadfile == "" || uploadfile == null) { jQuery("#s_FileUpload").show(); return false; } var extStart = uploadfile.lastIndexOf("."); var ext = uploadfile.substring(extStart, uploadfile.length); if (ext != ".pdf") { alert("只能上传pdf格式"); return false; } } jQuery("#btnUpload").click(SpanShow); }); </script>