<script language=javascript>
var alli = document.all.length;
for(var i = 0;i<=alli; i ++)
{
if (document.all(i).value==""){alert "请输入！"; return false};
return true;
}
</script>
var alli = document.all.length;
for(var i = 0;i<=alli; i ++)
{
if (document.all(i).value==""){alert "请输入！"; return false};
return true;
}
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<FORM METHOD=POST ACTION="">
<INPUT TYPE="text" NAME="a1">
<INPUT TYPE="text" NAME="a2">
<INPUT TYPE="text" NAME="a3">
<INPUT TYPE="text" NAME="a4">
<INPUT TYPE="password" NAME="a5">
<TEXTAREA NAME="a6" ROWS="5" COLS="5"></TEXTAREA>
<INPUT TYPE="button" onclick="CheckAll()" name="test" value="测试">
</FORM>
</BODY>
</HTML>
<SCRIPT LANGUAGE="JavaScript">
<!--
function CheckAll(a_formName)
{
var formName = 0;
if(a_formName!=null) formName=a_formName;
for(var i=0; i<document.forms(formName).elements.length; i++)
{
str = document.forms[formName].elements[i].value;
if (str=="" || str ==null)
{
alert ("不可以为空！");
document.forms[formName].elements[i].focus();
document.forms[formName].elements[i].select();
return false;
}
}
return true;
}
//-->
</SCRIPT>
function CheckEle()
{
var alli = document.all.length;
for(var i = 0;i<alli; i ++)
{
//alert(i);
if (document.all(i).value=="")
{
alert("请输入！");
document.all(i).focus();
return false
}
}
return true;
}
楼上xieyj(Free Fish) 的返回位置错了