js在jsp里不奏效！

js在jsp里不奏效！ jsåœ?jsp里ä??生æ?ˆï??ï??ï??ï??ï?? å,‚é??ï?Œé?„ä?Šä?,ä?ªæ?‡ä??çš„ä??ç •ï?Œå??åœ?æ‰?ä??出é??é??ï?Œæ?‚è??ç?”ï?• register.jsp %@ page language= java import= java.util.* pageEncoding= gbk % !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN html head title ç”?æˆ?æ??册 /title script language=JavaScript src= script/regcheckdata.js /script /head body form name= form action= register.jsp method= get onSubmit= return checkdata() input type=hidden name= action value=register table width= 750 align= center border= 2 tr td colspan= 2 align= center ç”?æˆ?æ??册 /td /tr tr td ç”?æˆ?å : /td td input type=text name= username size= 30 maxlength= 12 /td /tr tr td å?†ç •: /td td input type=password name= password size= 30 maxlength= 12 /td /tr tr td å?†ç •ç??è??: /td td input type=password name= password2 size= 30 maxlength= 12 /td /tr tr td 电è? : /td td input type=text name= phone size= 15 maxlength= 12 /td /tr tr td åœ?å??: /td td textarea rows= 12 cols= 80 name= addr /textarea /td /tr tr td /td td input type= submit value= æ äº? input type= reset value= é‡ ç?? /td /tr /table /form /body /html .js function checkdata(){ var ssn=form.username.value.toLowerCase(); if(!checkUserName(ssn)) return false; if(strlen(form.password.value) 6 || strlen(form.password.value) 16 ){ alert( ç??å??å?†ç •é??åº,ä?º6-16ä??ï?Œä?…å??ç”?å??æ??ï?Œæ??å??ï?Œç‰?æ?Šå??ç??ï?• ); form.password.focus(); return false; } if(strlen2(form.password.value)){