时间：2021-05-21 08:29:49 | 栏目：JavaScript代码 | 点击：次
JavaScript判断用户名和密码不能为空的实现代码
<script language="javascript"><!--
function VF_form1(){ //v2.0
<!--start_of_saved_settings-->
<!--type,password,name,Password,required,true,errMsg,密码不能为空!-->
<!--type,text,name,User,required,true,errMsg,用户名不能为空!-->
<!--end_of_saved_settings-->
var theform = document.form1;
var errMsg = "";
var setfocus = "";
if (theform['password'].value == "") {
errMsg = "密码不能为空!";
setfocus = "['password']";
}
if (theform['username'].value == "") {
errMsg = "用户名不能为空!";
setfocus = "['username']";
}
if (errMsg != ""){
alert(errMsg);
eval_r("theform" + setfocus + ".focus()");
}
else {
theform.submit();
}
} //-->
</script>