Raddatepicker inside the radgrid to disable for selected row

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C#

ASP.NET

In a radgrid there is 4 columns in this 1st column is raddropdown. Based on that raddropdown value, I need to disable or enable the raddatepicker on last column on that particulr row. Please help on this.

Thank you

What I have tried:

function handleChange(sender, args) {
var radGrid = $find('<%= RadGrid1.ClientID %>');
var targetCategory = sender;
var MasterTable = radGrid.get_masterTableView();
var Rows = MasterTable.get_dataItems();
var id;
for (var i = 0; i < Rows.length; i++) {
var row = Rows[i];
var drop1 = row.findControl("ddltypes");
if (drop1 == sender) {
id = i;
}
}
var MasterTable = radGrid.get_masterTableView();
var row = MasterTable.get_dataItems()[id];
var vals = row.findElement("ddltypes");
if (sender._selectedValue == 1) {

row.findElement("FromTime").disabled = true ;
row.findElement("ToTime").disabled = false;
}
else {
row.findElement("FromTime").disabled = true;
row.findElement("ToTime").disabled = true;
}
}