/* script migrated from EDC DropDownSelector.js for TVI ATA drop downs- works only in IE
FORMAT OF SELECT TAG REQUIRED for all drop downs on included page:
<html:select name="tVRequestUploadSingleForm"  property="moduleWorkscope"
id="moduleWorkscope" OnFocus="focused=this;" OnBlur="comboReset();" >
*/
    var tex = '';
    var focused = false;
    var originalVal = focused.selectedIndex;

    document.onkeydown = function()
    {
        if (focused && event.keyCode == 8)
        {
            tex = tex.substr(0, tex.length - 1);
            document.onkeypress1(1);
            return false;
        }
    }

    document.onkeypress1 = function(f)
    {
    // only relevant to specified dropdown controls.
    // it is crucial to specfify dropdowns to allow text entry elsewhere
    // on form.

        var controlName = event.srcElement.name;

        //IN EDC, if(dropdown) is used to selected certain drop down lists, e.g. if (controlName == "ataId" )
        if ( event.srcElement.tagName == 'SELECT' )
        {

            if (!f)
            {

                var e = event.keyCode;
                //setTimeout('timeout()',20000);
                switch (true)
                {
                case (e == 9 || e == 13 || e == 38 || e == 40): return true; break;
                case (e == 27):
                    // if escape pressed, revert back to original value
                    //window.status = '';
                    tex = '';
                    window.status = '';
                    return true;
                    break;
                case (31 < e < 127): tex += String.fromCharCode(e); break;
                default: return false;
                }
            }

            window.status = tex;
            var i = -1;
            if (focused.options != null)
            {
                while (focused.options[++i])
                    if (focused.options[i].text.substr(0,tex.length).toLowerCase() == tex.toLowerCase())
                    {
                        focused.selectedIndex = 0;
                        break;
                    }
                focused.selectedIndex = i;
            }
            return false;
        }
        else
        {
            if (event.keyCode == 13 && event.srcElement.type != 'submit')
                {

                    if (event.srcElement.name == "_TxtTVGoto")
                    {
                         document.Register.__EVENTTARGET.value = '_btnGoto';
                         document.Register.__EVENTARGUMENT.value = '';
                         document.Register.submit();

                    }
                    return false;
                }
                else
                {
                    return true;
                }

        }
    }


    function timeout()
    {
        tex = '';
        window.status = '';
        return true;
    }

    function comboReset()
    {
        tex = '';
        focused = false;
        window.status = '';
        return true;
    }