Question

Javascript form input boxes validation

Asked by: Svjetlana

I have a following form and need a help with the JavaScript function called SortValues(), please see my comments in the SortValues() function below. Many thanks!


<html>
<head>
<title>test</title>

<script language="javascript">
      function verifySortOrder()
      {
            for(i=0; i < document.form1.txtOrder.length; i++)
            {
                  if(isNaN(document.form1.txtOrder[i].value) || document.form1.txtOrder[i].value == '')
                  {
                        alert('Sort Order must be a Numeric value');
                        return false;
                  }
            }
            
            document.form1.submit();
      }

         

        function SortValues(){
      
      for(i=0; i < document.form1.txtOrder.length; i++)
            {

               // find the "txtOrder" input box where value is "0" and  where "txtPublished" input box value is "latest date"
                // check all the values in array of "txtOrder" input boxes to find the biggest number
               //  add "+1" to input box value where value is "0" so that latest "txtOrder" value becomes the highest number
 
            
                   }
      
      }


</script>

</head>
<body onLoad="SortValues()">

<form action="Sort.asp">" method="post" name="form1">

<table width="650" border="0" cellspacing="3" cellpadding="3" id="fList">


  <tr class="gHbgClr">
      <td class="gridTitle">Published Date</td>
        <td align="center" class="gridTitle">Sort Order</td>
  </tr>

  <%while not objectRecordSet.eof%>
  <tr>
    <td class="gridText ListBBrd"><input type="hidden" name="txtPublished" value="<%=objRecordSet("PublishedDate")%>"></td>
    <td class="gridText ListBBrd"><input type="text" name="txtOrder" value="<%=objectRecordSet("FSortOrder")%>"></td>
  </tr>
   
        <%objectRecordSet.movenext
        wend%>

   <tr>
     <td colspan="3">&nbsp;</td>
    <td align="center" height="40"><input type="button" value="Submit"onClick="verifySortOrder();"></td></tr>

</table>
</form>

</body>
</html>


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Asked On
2008-07-31 at 12:58:09ID23612263
Tags

JavaScript, ASP

,

Firefox 2.0, IE 6.0

Topics

Web Languages/Standards

,

JavaScript

,

JavaScript Frameworks

Participating Experts
1
Points
250
Comments
7

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Answers

 

by: mrdanyPosted on 2008-07-31 at 16:32:20ID: 22134405

i dont think there's a unique way of linking any txtPublished box with its own txtOrder.

but we can make use of the method document.getElementsByName which returns an array of all elements having a specific name.

assuming that document.getElementsByName("txtorder")[0] will be linked with document.getElementsByName("txtPublished")[0] we can proceed with your request.

i dont understand very well the definitions that you put in the folder, but i've assumed this is what you want... if might need some more tweeking, just let me know what are your needs, more clearly..

hope this helps,

cheers,

dan


function SortValues(){
	var tord=document.getElementsByName("txtOrder");
	var tpub=document.getElementsByName("txtPublished");
	var num=tord.length;
	var m=-1;
	var v=-1;
	
	if (num>0) {
		for (i=0;i<num;i++)
		{
			if ((tord[i].value==0)&&(tpub[i].value=="latest date"))
			{
				// find the "txtOrder" input box where value is "0" and  where "txtPublished" input box value is "latest date"
				v=i;
			}
			if (tord[i].value>m)
			{
				// check all the values in array of "txtOrder" input boxes to find the biggest number
				m=tord[i].value;
			}
		}
		// add "+1" to input box value where value is "0" so that latest "txtOrder" value becomes the highest number
		document.getElementsByName("txtOrder")[v].value=1*m+1;
	}
}

                                              
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by: SvjetlanaPosted on 2008-08-01 at 03:17:13ID: 22136793

Thanks Dan.

I've tired your suggestion, and have received the following error: "document.getElementsByName(...)[...]' is null or not an object"

I thought that "latest date" in "if ((tord[i].value==0)&&(tpub[i].value=="latest date"))" was a problem, so I have added the following field to the form:  

"<input type="text" name="txtCurrentDate" value="<%=Now%>">"

and passed it to the JavaScript as follows:

"if ((tord[i].value==0)&&(tpub[i].value==document.getElementsByName("txtCurrentDate")))"

"document.getElementsByName("txtPublished")" is a date field, so it needs to be compared with todays date "document.getElementsByName("txtCurrentDate")".  However this didn't solve the problem. The same error was still showing.


Even If I remove the following from the code completely:

"if ((tord[i].value==0)&&(tpub[i].value==document.getElementsByName("txtCurrentDate")))
                        {
                                v=i;
                        }"
 
I still received an error at:  "var v=-1;" line, saying: "document.getElementsByName(...)[...]" is null or not an object

Any ideas?


Maybe I should try to explain the problem properly, so just to clarify I need the following:

1. Search through an array of input boxes "txtOrder" and find the input box where value is "0"
2. When that record is found, I need to check if "txtPublished" record is higher or equal to today's date "txtCurrentDate"
3. If it is higher or equal to today's date then this is our record that we are looking for
4. Now we need to apply to this record the highest value, i.e. replace "txtOrder" value "0" to the highest number from the list. We might already have several "txtOrder" values on the list such as 1,2,3,4 so we need to replace our record value "0" to "5" for example.

Hope this makes more sense.

Cheers!!!

 

by: mrdanyPosted on 2008-08-01 at 05:33:00ID: 22137600

well that's very weird, i've tried it using firefox and it was working, what browser are you using??

anyways,
document.getElementsByName is an array, so u cant compare an item to the array
what i suggest is that  you put the textbox outside of your loop, and you give it an id, and then compare using the id..

example:

<form action="Sort.asp">" method="post" name="form1">
<input type="text" id="txtCurrentDate" value="<%=Now%>">
<%while not objectRecordSet.eof
...
...
wend%>

then in your javascript the checkup would change from getElementsByName to getElementByID (without S)
if ((tord[i].value==0) && (tpub[i].value==document.getElementByID("txtCurrentDate")))"

i'll try to rewrite the script, when i get back home...

cheers,

 

by: SvjetlanaPosted on 2008-08-01 at 10:27:54ID: 22140279

I am using IE 6.0. If I use Firefox no errors appear, but it doesnt do anything either.

I have added your suggestions above, and now getting Object doesn't support this property or method error.

Many thanks Dan!

 

by: SvjetlanaPosted on 2008-08-04 at 03:11:10ID: 22151196

Any luck? This is becoming vital now.

;(

 

by: mrdanyPosted on 2008-08-04 at 06:25:03ID: 22152175

this code is fully working in both ie6 and firefox3

<html>
<head>
	<title>Untitled</title>
	<script>
	function SortValues(){
        var tord=document.getElementsByName("txtOrder");
        var tpub=document.getElementsByName("txtPublished");
		var curdate=document.getElementById("curdate").value;
        var num=tord.length;
        var m=-1;
        var v=-1;
		if (num>0) {
        	for (i=0;i<num;i++){
				if ((tord[i].value==0)&&(tpub[i].value==curdate)){
					v=i;}
				if (tord[i].value>m){
					m=tord[i].value;}
			}
			if (v>=0) {
				document.getElementsByName("txtOrder")[v].value=1*m+1;}
        }
}
	</script>
</head>
 
<body>
<form name="myform">
<input type="Text" id="curdate" value="9/9/2008"><br>
<input type="Text" name="txtOrder" value="4"><input type="Text" name="txtPublished" value="9/9/2008"><br>
<input type="Text" name="txtOrder"value="3"><input type="Text" name="txtPublished" value="9/9/2008"><br>
<input type="Text" name="txtOrder" value="2"><input type="Text" name="txtPublished" value="9/9/2008"><br>
<input type="Text" name="txtOrder" value="0"><input type="Text" name="txtPublished" value="1/1/2008"><br>
<input type="Text" name="txtOrder" value="0"><input type="Text" name="txtPublished" value="9/9/2008"><br>
<input type="button" value="Submit" onclick="SortValues();" >
</form>
 
</body>
</html>

                                              
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by: SvjetlanaPosted on 2008-08-04 at 10:27:08ID: 22154247

That's great thanks!!!

I've only changed tpub[i].value==curdate to be tpub[i].value<curdate, because my curdate value would always be few seconds higher then  tpub value. Otherwise it works perfectly!

Many, many, many  thanks Dan ;o)

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