JavaScript - Dropdown Select Box Help

I have a function that creates a Select dropdown on the fly:


function makeForm() {

mypara=document.getElementById("paraID");
myform=document.createElement("form");
myselect = document.createElement("select");

theOption=document.createElement("OPTION");
theText=document.createTextNode("Revenue");
theOption.appendChild(theText);
myselect.appendChild(theOption);

myform.appendChild(myselect);
mypara.appendChild(myform);
myselect.onchange=TitleOnChange;
mybreak=document.createElement("p");
myform.appendChild(mybreak);
}
function makeForm() {

mypara=document.getElementById("paraID");
myform=document.createElement("form");
myselect = document.createElement("select");

theOption=document.createElement("OPTION");
theText=document.createTextNode("Revenue");
theOption.appendChild(theText);
myselect.appendChild(theOption);

myform.appendChild(myselect);
mypara.appendChild(myform);
myselect.onchange=TitleOnChange;
mybreak=document.createElement("p");
myform.appendChild(mybreak);
}




I would guess that I have to add something like: theOption.setAttribute("value","1");


I want to be able to call the following function and execute a code base on the selection of the Select Dropdown:


<script type='text/javascript'>
function TitleOnChange()
{
if (document.form.select.value == "1")
{
alert("Value selected on the Select dropdonw is 1");
}

}

</script>
<script type='text/javascript'>
function TitleOnChange()
{
if (document.form.select.value == "1")
{
alert("Value selected on the Select dropdonw is 1");
}

}

</script>



I don't know why is not working. I assigned the value 1 to the select dropdown theOption.setAttribute("value","1");

I call the TitleOnChange function myselect.onchange=TitleOnChange;

And Finally I indicate that if the value is equal to 1 do...

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if (document.form.select.value == "1")
{
alert("Value selected on the Select dropdonw is 1");
}
if (document.form.select.value == "1")
{
alert("Value selected on the Select dropdonw is 1");
}



Does anyone knows why this doesn't work and how could I fix it?

Any helpt would be highly appreciate.

Thanks

Ok so let's say I have this dropdown with a list of these items:

PALCO
TRIBUNA
ORO

And in a button on the page I want to send it one of those names, let's say I send it ORO, and through Javascript select that in the dropdown list. How is this done? Do I have to iterate through everything, and how?

Thanks for any help in the subject.

I have up to 3 dropdown lists that I can select using javascript functions. Depending on what I select in the first dropdown loads what is in the 2nd drop down and so on. i want to be able to select the first drop down and it skips the 2nd one and displays the 3rd one. How do I do that with the current functions I am using.

Code:

function cboSourceChange(){
		var iSource = document.frmHarvestForm.cboSource.options[document.frmHarvestForm.cboSource.selectedIndex].value;
		var iSub1 = document.frmHarvestForm.cboSub1.options[document.frmHarvestForm.cboSub1.selectedIndex].value;
		var iSub2 = document.frmHarvestForm.cboSub2.options[document.frmHarvestForm.cboSub2.selectedIndex].value;
		var dtBeginDate = document.frmHarvestForm.txtBeginDate.value;
		var dtEndDate = document.frmHarvestForm.txtEndDate.value;
		var iIndCert = document.frmHarvestForm.cboIndCert.value;
		location.replace("HarvestBoard.asp?cboSource="+iSource+"&cboSub1=0&cboSub2=0&cboSub3=0&txtBeginDate="+dtBeginDate+"&txtEndDate="+dtEndDate+"&cboIndCert="+iIndCert);
	}
	function cboSub1Change(){
		var iSource = document.frmHarvestForm.cboSource.options[document.frmHarvestForm.cboSource.selectedIndex].value;
		var iSub1 = document.frmHarvestForm.cboSub1.options[document.frmHarvestForm.cboSub1.selectedIndex].value;
		var dtBeginDate = document.frmHarvestForm.txtBeginDate.value;
		var dtEndDate = document.frmHarvestForm.txtEndDate.value;
		var iIndCert = document.frmHarvestForm.cboIndCert.value;
		location.replace("HarvestBoard.asp?cboSource="+iSource+"&cboSub1="+iSub1+"&cboSub2=0&cboSub3=0&txtBeginDate="+dtBeginDate+"&txtEndDate="+dtEndDate+"&cboIndCert="+iIndCert);
	}
	function cboSub2Change(){
		var iSource = document.frmHarvestForm.cboSource.options[document.frmHarvestForm.cboSource.selectedIndex].value;
		var iSub1 = document.frmHarvestForm.cboSub1.options[document.frmHarvestForm.cboSub1.selectedIndex].value;
		var iSub2 = document.frmHarvestForm.cboSub2.options[document.frmHarvestForm.cboSub2.selectedIndex].value;
		var dtBeginDate = document.frmHarvestForm.txtBeginDate.value;
		var dtEndDate = document.frmHarvestForm.txtEndDate.value;
		var iIndCert = document.frmHarvestForm.cboIndCert.value;
		location.replace("HarvestBoard.asp?cboSource="+iSource+"&cboSub1="+iSub1+"&cboSub2="+iSub2+"&cboSub3=0&txtBeginDate="+dtBeginDate+"&txtEndDate="+dtEndDate+"&cboIndCert="+iIndCert);
	}
	function cboSub3Change(){
		var iSource = document.frmHarvestForm.cboSource.options[document.frmHarvestForm.cboSource.selectedIndex].value;
		var iSub1 = document.frmHarvestForm.cboSub1.options[document.frmHarvestForm.cboSub1.selectedIndex].value;
		var iSub2 = document.frmHarvestForm.cboSub2.options[document.frmHarvestForm.cboSub2.selectedIndex].value;
		var iSub3 = document.frmHarvestForm.cboSub3.options[document.frmHarvestForm.cboSub3.selectedIndex].value;
		var dtBeginDate = document.frmHarvestForm.txtBeginDate.value;
		var dtEndDate = document.frmHarvestForm.txtEndDate.value;
		var iIndCert = document.frmHarvestForm.cboIndCert.value;
		location.replace("HarvestBoard.asp?cboSource="+iSource+"&cboSub1="+iSub1+"&cboSub2="+iSub2+"&cboSub3="+iSub3+"&txtBeginDate="+dtBeginDate+"&txtEndDate="+dtEndDate+"&cboIndCert="+iIndCert);
	}

Hello,

I have this reservation form found on the main page of: http://www.avis.com.lb/
As you can see the current month "August" is selected as the default month and so is the year and day (the day is programmed to jump 2 days ahead for the renting of the car...)

However if you look closely (check the screenshot attached) you'll see that the month "August" is repeated twice and so is the year "2009", the current month is repeated twice. What I wanna do is remove the duplication and just auto select the current month without duplicating it.

I found this code: http://www.experts-exchange.com/Prog..._24229186.html
But it doesn't seem to work with my form, I donno why.

Here is the code of the script both javascript and a little bit of php
PHP Code:
$date = strtotime("+2 day");
                $date2 = date('j',$date);
                 $date4 = strtotime("+5 day");
                $date3 = date('j',$date4);
                if($date3 == 1){
                $nextmonth = strtotime("+1 day");
                $monthid = date('m',$nextmonth);    
                }else{
                $nextmonth = strtotime("+0 day");
                $monthid = date('m',$nextmonth);    
                }
            if ($monthid==1){
                $year = date("Y") + 1;
            }else{
                $year = date("Y");
            }
              //$pupday = date("j") - 12;
              //$pupday = date("d") + 2;
              //echo $pupday;
              //$returnday = date("d") +5;
              $month = date("F"); 


Code:

var xMonths = new Array( '01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12' );

function getListValue( option_object  ){return option_object[ option_object.selectedIndex ].value;}
function setListValue( option_object, value  ){ option_object.selectedIndex = value;}
function addDays(myDate,days) {
    return new Date(myDate.getTime() + days*24*60*60*1000);
}
function init()
{
xToday = new Date();
yToday = addDays(new Date(),3);

xMonth = xToday.getMonth();
xDay = xToday.getDate()-1;
xYear = xToday.getYear()-2005; if (xYear < 2005) xYear=0;
yMonth = yToday.getMonth();
yDay = yToday.getDate()-1;
yYear = yToday.getYear()-2005; if (yYear < 2005) yYear=0;
  xF = document.forms['quickbooking'];
  setListValue( xF.ETAHour, 9 )
  setListValue( xF.ETAMonth, xMonth )
  setListValue( xF.ETADay, xDay )
  setListValue( xF.ETAYear, xYear )
  setListValue( xF.ETTHour, 9 )
  setListValue( xF.ETTMonth, yMonth )
  setListValue( xF.ETTDay, yDay )
  setListValue( xF.ETTYear, yYear )
}

Code:

<select class="formField" name="ETAMonth">
                <option value="<? echo $monthid; ?>"  selected="selected"><? echo $month; ?></option>
                <option 
                                value="01">January</option>
                <option 
                                value="02">February</option>
                <option value="03">March</option>
                <option 
                                value="04">April</option>
                <option value="05">May</option>
                <option 
                                value="06">June</option>
                <option value="07">July</option>
                <option 
                                value="08">August</option>
                <option value="09">September</option>
                <option 
                                value="10">October</option>
                <option value="11">November</option>
                <option 
                                value="12">December</option>
              </select>
              <select 
                                class="formField" name="ETAYear">
              <option value="<? echo $year; ?>" selected="selected"><? echo $year; ?></option>
              <option value="2008">2008</option>
              <option value="2009">2009</option>
              <option value="2010">2010</option>
            </select>

Help is very appreciated, thanks.

Hi,

I'm trying to integrate an address finder (http://www.craftyclicks.co.uk/) into my shopping cart (OsCommerce). I can get it to work but I need to add my own functionality. I'm not very experienced with JavaScript and my head has entered an infinite loop by now.

The problem is that the address finder script can change the selected country in a drop-down list depending on the postcode entered by the user (using the onblur event handler). What I need it to do is to remove all other countries depending on the postcode. I can get it to remove all other countries but how do i return to the original list of countries when the postcode is changed again? Once all other counties are removed, the drop-down list will obviously only have one option left... I guess the question is also how does a function remember what it has done before, when it is called again?

I have written this short test script as it is easier to work with than the craftyclicks oscommerce contribution:

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 
<head>

<title>HTML Template</title>
 
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="description" content="" />
<meta name="keywords" content="" />

<script type="text/javascript">
//<![CDATA[

function store(element) {

// store values

	var cl = element;
	
	var text_list = new Array();
			
	var value_list = new Array();
	
	var length = cl.length;
	
	for (var foo=0; foo<length; foo++) {
	
		text_list[foo] = cl.options[foo].text;
		
		value_list[foo] = cl.options[foo].value;
		
		alert("text array " + foo + " " + text_list[foo]);
		
		alert("value array " + foo + " " + value_list[foo]);
		
	}
	
	populate(cl, text_list, value_list);

}

function populate(element, text, value) {

	// populate options with previously stored values
	
	var cl = element;
	
	var length = cl.length;

	cl.options.length=0;	
	
	for (var bar=0; bar<length; bar++) {
		
		cl.options[bar]= new Option(text[bar], value[bar], false, false);
		
	}
	
}

function crafty_set_country(code) {	

	var cl = document.getElementById('select');
	
	store(cl);
	
	for (var i=0; i<cl.length; i++) {

		if (cl.options[i].value == code) {

			alert(cl.options[i].value + " found");
			
			var value = cl.options[i].value;
			
			var text = cl.options[i].text;
			
			cl.options.length=0;
			
			cl.options[0]=new Option(text, value, true, true);
			
			/*
			for (var j=0; j<cl.length; j++) {
			
				alert("second loop " + cl.options[j].text);
				
				if (cl.options[i].value != code) {
				
					cl.options[j]
				
				}
			
			}
			*/
			
		} else {
		
		alert(cl.options[i].value);
		
		}
		
	}
	
}

//]]>
</script>

</head>
 
<body>

<form>

<select id="select">
  <option value="10">ten</option>
  <option value="20">twenty</option>
  <option value="30">thirty</option>
  <option value="40">fourty</option>
  <option value="50">fifty</option>
  <option value="60">sixty</option>
</select>

<input type="button" value="remove" name="button" onClick="crafty_set_country(50)">
<input type="button" value="repopulate" name="button" onClick="crafty_set_country(100)">

</form>

</body>
</html>

Many thanks!

Martin