[SOLVED] using variable to get a for id

[M.O.S. Studios]

hey guys,

 

I have drop down menu called country shipping, and thoe other called country billing.

basicly when come one chooses the country the drop down under it fills with states or provinces

 

here is the function i use

 

function ClearOptionsFast(id)
{
var selectObj = document.getElementById(id);
var selectParentNode = selectObj.parentNode;
var newSelectObj = selectObj.cloneNode(false); // Make a shallow copy
selectParentNode.replaceChild(newSelectObj, selectObj);
return newSelectObj;
}

function addOption(selectbox,text,value)
{
var optn = document.createElement("OPTION");
optn.text = text;
optn.value = value;
selectbox.options.add(optn);
}

function ChangeDropdowns(value,item_id){
if(value=='CANADA/1/1'){
addOption(document.userprofileform.getElementByName(item_id),'Northwest Territories', 'Nt/1')
addOption(document.userprofileform.getElementByName(item_id),'Newfoundland and Labrador', 'Nl/1')
addOption(document.userprofileform.getElementByName(item_id),'New Brunswick', 'Nb/1')
addOption(document.userprofileform.getElementByName(item_id),'British Columbia', 'Bc/1')
addOption(document.userprofileform.getElementByName(item_id),'Manitoba', 'Mb/1')
addOption(document.userprofileform.getElementByName(item_id),'Alberta', 'Ab/1')

}

here is how its called

 

<select name="ship_con" onChange="ClearOptionsFast('ship_pro'),ChangeDropdowns(this.value,'ship_pro');">
			<option value="CANADA/1/1" SELECTED>CANADA</option>
</select>

 

 

now when i replace the variable 'id_value' with the name of the drop down it works fine, but when i replace it with the variable, it dosn't work, any one see the prob?? thanks in advanced

[Ken2k7]

What variable id_value? What are you talking about?

[M.O.S. Studios]

im sorry, i posted late last night,

 

the var name is item_id,

when i use the ChangeDropdowns(value,item_id) function,

 

for example, this code works

function ChangeDropdowns(value,item_id){
if(value=='CANADA/1/1'){
addOption(document.userprofileform.ship_pro,'Northwest Territories', 'Nt/1')
}}

 

but i want to replace ship_pro with the variable 'item_id' so that i can control where it put that information with one script. instead of having two scripts that have the exactly the same info just a differn't location

[Ken2k7]

function ChangeDropdowns(value,item_id){
if(value=='CANADA/1/1'){
addOption(document.forms.userprofileform[item_id],'Northwest Territories', 'Nt/1')
}}

[M.O.S. Studios]

as always the phpfreak fourms are a life saver,

 

worked like a charm thanks guys.