Passing a form value without hitting the submit but

[otgriffin]

Hello,

I am building a survey and I need to disable certain form elements when a selection is made in a radiobutton group. I am using Php and mysql. I have written a function in javascript that I thought would disable the needed elements but it will not. Here is the javascript code:

function disable_enable(){
if(document.survey.tspdata.value=="Vector&quot{
document.survey.GeoTIFF.disabled=true;
document.survey.ESRI_BIL.disabled=true;
document.survey.ASCII_Grid.disabled=true;
document.survey.ENVI.disabled=true;
document.survey.ERDAS.disabled=true;
document.survey.PCI.disabled=true;
document.survey.Tiff_tfw.disabled=true;
}else if(document.survey.tspdata.value=="Raster&quot{
document.survey.ESRI_GeoData_Base.disabled=true;
document.survey.ESRI_shape.disabled=true;
document.survey.ESRI.e00.disabled=true;
document.survey.DXF.disabled=true;
document.survey.DWG.disabled=true;
document.survey.DGN.disabled=true;
document.survey.Intergraph_GeoMedia_Access_Warehouse.disabled=true;
document.survey.Intergraph_Microstation.disabled=true;
document.survey.MapInfo_Tab.disabled=true;
document.survey.MapInfo_Mif_Mid.disabled=true;
}
}

//end of code
I call this in my html code as : <input name=&quot;tspdata&quot; type=&quot;radio&quot; value=&quot;Vector&quot; onSelect=&quot;disable_enable()&quot;>

It seems to me that the script is not obtaining the value in the field tspdata. I was wondering if I need to pass the value to my url, but the problem with this is that I don't want to hit the submit button to do so. When I hit the submit button I want to make an insert into a database. Can someone please enlighten me on what is going on and then help me correct this problem.

Thank you in advance!

 

[skiflyer]

try the javascript forum, they can probably answer this in a couple seconds for you.

 

[Marklar]

radio buttons are a bit dodgy in Javascript.

They are stored in an array with the value inaccessible until the form is posted.

However, you can use:

if(document.survey.tspdata[0].checked==true){

if it's not the first radiobutton with the name tspdata, change the array index accoringly. ie, forth button is tspdata[3]

 

[otgriffin]

Marklar,

Thank you for your advice. I am sure this will work, but I had already solved the problem by using two sperate functions and then I called onPropertyChange=&quot;my_function()&quot; in my input tag. This seems to work like I wanted it to. I am defintely sure that I will be using your idea on other projects.