By using this site, you agree to our updated Privacy Policy and our Terms of Use. Manage your Cookies Settings.
424,851 Members | 985 Online
Bytes IT Community
+ Ask a Question
Need help? Post your question and get tips & solutions from a community of 424,851 IT Pros & Developers. It's quick & easy.

Multiple dynamic combo boxes

P: n/a
<html>
<head>
<script language="JavaScript">
<!--

/*
*** Multiple dynamic combo boxes
*** by Mirko Elviro, 9 Mar 2005
***
***Please do not remove this comment
*/

// This script supports an unlimited number of linked combo boxed
// Their id must be "combo_0", "combo_1", "combo_2" etc.
// Here you have to put the data that will fill the combo boxes
// ie. data_2_1 will be the first option in the second combo box
// when the first combo box has the second option selected
// first combo box

data_1 = new Option("1", "$");
data_2 = new Option("2", "$$");

// second combo box

data_1_1 = new Option("11", "-");
data_1_2 = new Option("12", "-");
data_2_1 = new Option("21", "--");
data_2_2 = new Option("22", "--");
data_2_3 = new Option("23", "--");
data_2_4 = new Option("24", "--");
data_2_5 = new Option("25", "--");

// third combo box

data_1_1_1 = new Option("111", "*");
data_1_1_2 = new Option("112", "*");
data_1_1_3 = new Option("113", "*");
data_1_2_1 = new Option("121", "*");
data_1_2_2 = new Option("122", "*");
data_1_2_3 = new Option("123", "*");
data_1_2_4 = new Option("124", "*");
data_2_1_1 = new Option("211", "**");
data_2_1_2 = new Option("212", "**");
data_2_2_1 = new Option("221", "**");
data_2_2_2 = new Option("222", "**");
data_2_3_1 = new Option("231", "***");
data_2_3_2 = new Option("232", "***");

// fourth combo box

data_2_2_1_1 = new Option("2211","%")
data_2_2_1_2 = new Option("2212","%%")

// other parameters

displaywhenempty=""
valuewhenempty=-1

displaywhennotempty="-select-"
valuewhennotempty=0
function change(currentbox) {
numb = currentbox.id.split("_");
currentbox = numb[1];

i=parseInt(currentbox)+1

// I empty all combo boxes following the current one

while
((eval("typeof(document.getElementById(\"combo_"+i +"\"))!='undefined'"))
&&
(document.getElementById("combo_"+i)!=null)) {
son = document.getElementById("combo_"+i);
// I empty all options except the first one (it isn't allowed)
for (m=son.options.length-1;m>0;m--) son.options[m]=null;
// I reset the first option
son.options[0]=new Option(displaywhenempty,valuewhenempty)
i=i+1
}
// now I create the string with the "base" name ("stringa"), ie.
"data_1_0"
// to which I'll add _0,_1,_2,_3 etc to obtain the name of the combo
box to fill

stringa='data'
i=0
while
((eval("typeof(document.getElementById(\"combo_"+i +"\"))!='undefined'"))
&&
(document.getElementById("combo_"+i)!=null)) {

eval("stringa=stringa+'_'+document.getElementById( \"combo_"+i+"\").selectedIndex")
if (i==currentbox) break;
i=i+1
}
// filling the "son" combo (if exists)

following=parseInt(currentbox)+1

if
((eval("typeof(document.getElementById(\"combo_"+f ollowing+"\"))!='undefined'"))
&&
(document.getElementById("combo_"+following)!=null )) {
son = document.getElementById("combo_"+following);
stringa=stringa+"_"
i=0
while ((eval("typeof("+stringa+i+")!='undefined'")) || (i==0)) {

// if there are no options, I empty the first option of the
"son" combo
// otherwise I put "-select-" in it

if ((i==0) && eval("typeof("+stringa+"0)=='undefined'"))
if (eval("typeof("+stringa+"1)=='undefined'"))
eval("son.options[0]=new
Option(displaywhenempty,valuewhenempty)")
else
eval("son.options[0]=new
Option(displaywhennotempty,valuewhennotempty)")
else
eval("son.options["+i+"]=new
Option("+stringa+i+".text,"+stringa+i+".value)")
i=i+1
}
//son.focus()
i=1
combostatus=''
cstatus=stringa.split("_")
while (cstatus[i]!=null) {
combostatus=combostatus+cstatus[i]
i=i+1
}
return combostatus;
}
}

//-->
</script>
<title>Multiple dynamic combo boxes - by Elviro Mirko</title>
</head>
<body>
<form>
<select name="combo0" id="combo_0" onChange="change(this);"
style="width:200px;">
<option value="value1">-select-</option>
<option value="value2">1</option>
<option value="value3">2</option>
</select>
<BR><BR>
<select name="combo1" id="combo_1" onChange="change(this)"
style="width:200px;">
<option value="value1"> </option>
</select>
<BR><BR>
<select name="combo2" id="combo_2" onChange="change(this);"
style="width:200px;">
<option value="value1"> </option>
</select>
<BR><BR>
<select name="combo3" id="combo_3" onChange="change(this);"
style="width:200px;">
<option value="value1"> </option>
</select>

</form>
</body>
</html>

Jul 23 '05 #1
Share this Question
Share on Google+
3 Replies


P: n/a
vg*******@libero.it wrote:
<html>
<head>
<script language="JavaScript">
<!--

/*
*** Multiple dynamic combo boxes
*** by Mirko Elviro, 9 Mar 2005
***
***Please do not remove this comment
*/


LOL where is your problem?
NRN
Jul 23 '05 #2

P: n/a
I guess you can further improve on the function change(). It uses eval
quite a lot and i think you can pass more arguments to it, have
data[1][2] instead of data_1_2, etc. But what is the _problem_??

Jul 23 '05 #3

P: n/a
c.**********@gmail.com wrote:
I guess you can further improve on the function change(). It uses eval
quite a lot and i think you can pass more arguments to it, have
data[1][2] instead of data_1_2, etc. But what is the _problem_??


I see 2 problems:

Not quoting previous posting?
The script?

Mick
Jul 23 '05 #4

This discussion thread is closed

Replies have been disabled for this discussion.