How to convert a optionset into multi selection picklist in crm 2011 using javasacript??

Question

hi,
where user want to select not only one but multiple value
from a pick list. I tried  examples but it shows some errors.
How  to do it??

Answer 1

Hey I meet a problème on my development see my result :
link : https://social.microsoft.com/Forums/getfile/652331
a multiple select list on my crm 2013 I do this process on this forum :
link : https://social.microsoft.com/Forums/en-US/2db47a59-165d-40c9-b995-6b3262b949eb/how-to-convert-a-optionset-into-multi-selection-picklist-in-crm-2011-using-javasacript?forum=crmdevelopment
my development :
// var_sc_optionset >> Provide schema-name for Option Set field
// var_sc_optionsetvalue >> Provide schema-name for field which will store the multi selected values for Option Set
// OS >> Provide Option Set field object
// OSV >> Provide text field object which will store the multi selected values for Option Set
//Method to convert an optionset to multi select Option Set
function ConvertToMultiSelect(var_sc_optionset, var_sc_optionsetvalue, OS, OSV)
if( OS != null && OSV != null )
OS.style.display = "none";
Xrm.Page.getControl(var_sc_optionsetvalue).setVisible(false);
// Create a DIV container
// var addDiv = document.createElement("<div style='overflow-y:auto; color:#000000; height:160px; border:1px #6699cc solid; background-color:#ffffff;' />");
var addDiv = document.createElement("div");
addDiv.style.overflowY = "auto";
addDiv.style.height = "160px";
addDiv.style.border = "1px #6699cc solid";
addDiv.style.background = "#ffffff";
addDiv.style.color = "#000000";
OS.parentNode.appendChild(addDiv);
// Initialise checkbox controls
for( var i = 1; i < OS.options.length; i++ )
var pOption = OS.options[i];
if( !IsChecked( pOption.text , OS, OSV) ){
// var addInput = document.createElement("<input type='checkbox' style='border:none; width:25px; align:left;' />" );
var addInput = document.createElement("input" );
addInput.setAttribute("type","checkbox");
addInput.setAttribute("style","border:none; width:25px; align:left;");
else {
// var addInput = document.createElement("<input type='checkbox' checked='checked' style='border:none; width:25px; align:left;' />" );
var addInput = document.createElement("input" );
addInput.setAttribute("type","checkbox");
addInput.setAttribute("checked","checked");
addInput.setAttribute("style","border:none; width:25px; align:left;");
// var addLabel = document.createElement( "<label />");
var addLabel = document.createElement( "label");
addLabel.innerText = pOption.text;
// var addBr = document.createElement( "<br />"); //it's a 'br' flag
var addBr = document.createElement( "br"); //it's a 'br' flag
OS.nextSibling.appendChild(addInput);
OS.nextSibling.appendChild(addLabel);
OS.nextSibling.appendChild(addBr);
///////Supported functions
// Check if it is selected
function IsChecked( pText , OS, OSV)
if(OSV.value != "")
var OSVT = OSV.value.split(";");
for( var i = 0; i < OSVT.length; i++ )
if( OSVT[i] == pText )
return true;
return false;
// var_sc_optionsetvalue >> Provide schema-name for field which will store the multi selected values for Option Set
// OS >> Provide Option Set field object
// Save the selected text, this field can also be used in Advanced Find
function OnSave(OS, var_sc_optionsetvalue)
var getInput = OS.nextSibling.getElementsByTagName("input");
var result = '';
for( var i = 0; i < getInput.length; i++ )
if( getInput[i].checked)
result += getInput[i].nextSibling.innerText + ";";
//save value
control = Xrm.Page.getControl(var_sc_optionsetvalue);
attribute = control.getAttribute();
attribute.setValue(result);
I have to do 2 field one is option list field and the second is textfield, 
option list field : new_books
textfiled          : new_picklistvalue
my js is on onload event see : 
link : https://social.microsoft.com/Forums/getfile/652333
thanks you for you'r help