[阅读: 385] 2007-04-24 07:27:31
var objFileupload=document.getElementsByName("photoUpload")[0];
var sFilename=objFileupload.value;
alert(sFilename);
var s=sFilename.lastIndexOf(".");
var s2=s.substring(s+1).toUpperCase();
alert(s2);
alert(sFilename)可以执行,alert(s2)不执行