求助：动态表单个数如果验证内容是否为空？

另一种办法，
如果你的input在一个name=myForm的form元素里面
可以取出其中的所有input进行循环，
代码略

<% for i=1 to geshu %>
<input name="jiage" type="text" maxlength="50">
<%next%>
</form>function checkForm()
{
var num = parseInt(document.all.num.value);//取个数
for(i=0;i<num;i++)
{
if(num==1)
{
if(document.all.jiage.value=="")
{
alert("有一项价格未填写！");
document.all.jiage.focus();
return false;
}
}
else
{
if(document.all.jiage[i].value=="")
{
alert("有一项价格未填写！");
document.all.jiage[i].focus();
return false;
}
}
}
}

<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head><body>
先写一个共用的JS函数：<br>
<script language="javascript">
  function dataV(aObj)
   {
    if (!aObj)
      return false;
    if (aObj.value=="")
       {
        alert(aObj.name+'的值为空！');
        return false;
       }
    else
      return true;
   }
</script>
<%geshu=3%>
<% for i=1 to geshu %>
<input name="jiage<%=i%>" type="text" maxlength="50" onBlur="dataV(this);">
<%next%>
</form>
</body>
</html>------------------------
http://kmok.cn/

表单中增加一个隐藏元素
<input name="num" type="hidden" value="<%=geshu%>">

如果你是用这样的方法在同一个页面表内插入实现动态添加的话
<script>
i=1
function add(){
var newTR = a1.cloneNode(true);
newTR.id="a1"+(++i);
a1.parentNode.insertAdjacentElement("beforeEnd",newTR);
}
那么你的验证就应该这样拉

var obj = document.getElementsByName("控件名称");
for(var i=0;i<obj.length;i++){

   if (obj[i].value.length== 0 ) {
    alert("请输入完整的数据");
obj[i].focus();
return;
    break;
}
   }

<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head><body>
<form name=frm>
<input name="jiage1" type="text" maxlength="50" altStr="价格1">*
<input name="jiage2" type="text" maxlength="50" altStr="价格2">*
<input name="jiage3" type="text" maxlength="50" altStr="价格3">*
<input name="jiage4" type="text" maxlength="50" altStr="价格4">*
<input name="jiage5" type="text" maxlength="50" >
<input name="jiage6" type="text" maxlength="50" ><input type=button value=验证 onclick="checkAllNecessaryInputs(document.frm);">
</form></body></html>
<script>
/**
* This function is to get if all necessary inputs have been inputted.
* Please give the NecessaryInput a property named "altStr".This property will be alert when it has not been inputed.
* For Example,
* This is a necessary input:<input altStr="Name">
* This is not a necessary input:<input >
* JK 2003-12-08
*/
function checkAllNecessaryInputs(formObj)
{
if(formObj==null) formObj=document.forms[0];
var theFirstNecessaryInputToBeFilled=null;//Get it to focus;
var theAlertStr="";
var theNumOfInputsToBeFilled=0;

var theElementsOfTheForm=formObj.elements;
for (var i=0;i<theElementsOfTheForm.length;i++)
{
if(theNumOfInputsToBeFilled>9) break;//实际使用中，请将本句的9改成0.
if((theElementsOfTheForm[i].altStr!=null)
&&(theElementsOfTheForm[i].altStr!="")
&&(theElementsOfTheForm[i].value=="")
)
{
theNumOfInputsToBeFilled++;
theAlertStr=theAlertStr+"\n"+theElementsOfTheForm[i].altStr;
if(theFirstNecessaryInputToBeFilled==null)
theFirstNecessaryInputToBeFilled=theElementsOfTheForm[i];
}
}
if(theNumOfInputsToBeFilled>0)
{
alert("Please input :"+ theAlertStr);
theFirstNecessaryInputToBeFilled.focus();
return false;
}
return true;
}</script>

我用了chjpeng(鹏) 的方法可以达到我要效果，结贴，散分，谢谢各位啊！

调试易

求助：动态表单个数如果验证内容是否为空？

解决方案 »