Script写验证

<script language =vbscript>
function ckcg()
if not isnumeric(document.chgc.txtCNo.value)  then
  msgbox "请输入正确的课程号！"
  document.chgc.txtCNo.value = ""
  ckcg = false
  exit function
  
end if
if document.chgc.txtCName.value = "" then
  msgbox "请输入正确的课程名称！"
  ckcg = false
  exit function
end if
if document.chgc.txtCTeacher.value ="" then
 msgbox "请输入正确的任课老师！"
  ckcg = false
  exit function
end if
if not isnumeric(document.chgc.txtCNum.value) then
 msgbox "请输入正确的总学时！"
 document.chgc.txtCNum.value = ""
 ckcg = false
 exit function
end if
if not isnumeric(document.chgc.txtCMM.value ) then
 msgbox "请输入正确的金额！"
 document.chgc.txtCMM.value = ""
 ckcg = false
 exit function
end if
if not isnumeric(document.chgc.txtCCredit.value ) then
 msgbox "请输入正确的学分！"
 document.chgc.txtCCredit.value = ""
 ckcg = false
 exit function
end if
if document.chgc.txtCTime.value ="" then
 msgbox "请输入正确的上课时间！"
  ckcg = false
  exit function
end if
if not isnumeric(document.chgc.txtCStuNum.value) then
  msgbox "请输入正确的选课学生总数！"
  document.chgc.txtCStuNum.value = ""
  ckcg = false
  exit function
end if
if document.chgc.txtCDemo.value =""  then
 document.chgc.txtCDemo.value = " "
end if
 ckcg = true
end function
</script>

<script language="javascript">
function ckdel(){
 if(confirm('删除的课程信息将无法恢复，你确定吗？')){
  window.close();
  return true;
 }
 else
 return false;
}
</script>
Javascript写 innerHTML
document.all("Info").innerHTML = " "
注意innerText innerHTML 的区别