how can we handle listbox data on textbox keypress event in asp.net

  var txtValue = document.getElementById('<%=TextBox1.ClientID %>').value;
        var lstbox = document.getElementById('<%=ListBox1.ClientID %>');
        var opt;
        var array = new Array();
        var array1 = new Array();
        array = lstbox.options;
        if (txtValue != '') {
            for (var i = 0; i < array.length; i++) {
                if (array[i].text.toLowerCase().indexOf(txtValue) != -1) {
                    opt = document.createElement("option");
                    opt.text = array[i].text;
                    opt.value = array[i].value;
                    array1.push(opt);
                }
            }
            lstbox.options.length = 0;
            for (var i = 0; i < array1.length; i++) {
                opt = document.createElement("option");
                opt.text = array1[i].text;
                opt.value = array1[i].value;
                lstbox.add(opt);
            }
        }
        else {
            lstbox.options.length = 0;
            for (var i = 0; i < array.length; i++) {
                opt = document.createElement("option");
                opt.text = array[i].text;
                opt.value = array[i].value;
                lstbox.add(opt);
            }
        }
    }

sravan

sravan

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