Search LookUp Column and select the value in the Dropdownlist using ECMA Script and JQuery

var myColl="";
var myColl1="";
var strCurrentWeb="";
var strCurrentSiteUrl="";
function SearchLookUpData()
{
    try
    {
        var context = new SP.ClientContext.get_current();
        var web = context.get_web();
        strCurrentWeb=context.get_url();
        strCurrentSiteUrl=window.location.protocol + '//' + window.location.host + strCurrentWeb;
        var list = web.get_lists().getByTitle('Book Names');
        var sQuery="<View><Query><Where><Eq><FieldRef Name='ID' /><Value Type='Counter'>4</Value></Eq></Where></Query></View>";
        var camlQuery = new SP.CamlQuery();
        camlQuery.set_viewXml(sQuery);
        this.myColl1 = list.getItems(camlQuery);
        context.load(this.myColl1, 'Include(Title, ID, Category)');
        context.executeQueryAsync(Function.createDelegate(this, this.SearchLookUpDataSuccess), Function.createDelegate(this, this.SearchLookUpDataFailed));
    }
    catch(Ex)
    {
        alert(Ex);
    }
}

function SearchLookUpDataSuccess()
{
    var strBookNames="";
    strBookNames+="<Table>";
    if(myColl1.get_count()!=0)
    {
        var listEnumerator = this.myColl1.getEnumerator();
        while (listEnumerator.moveNext())
        {
            var item = listEnumerator.get_current();
            var strCategoryID=item.get_item('Category').get_lookupId();
            $('select#ddlCategory').val(strCategoryID);
            break;
        }
    }
    else
    {
       

    }   
}

function SearchLookUpDataFailed(sender, args)
{
    alert('failed. Message:' + args.get_message());
}

function BindData()
{
    ExecuteOrDelayUntilScriptLoaded(BindLookUpData, "sp.js");
    ExecuteOrDelayUntilScriptLoaded(SearchLookUpData, "sp.js");
}


function BindLookUpData()
{
    try
    {
        //debugger;
        var context = new SP.ClientContext.get_current();
        var web = context.get_web();
        strCurrentWeb=context.get_url();
        strCurrentSiteUrl=window.location.protocol + '//' + window.location.host + strCurrentWeb;
        var list = web.get_lists().getByTitle('Book Category');
        var sQuery="<View><Query><OrderBy><FieldRef Name='ID' /></OrderBy></Query></View>";
        var camlQuery = new SP.CamlQuery();
        camlQuery.set_viewXml(sQuery);
        this.myColl = list.getItems(camlQuery);
        context.load(this.myColl, 'Include(Title, ID)');
        context.executeQueryAsync(Function.createDelegate(this, this.BindLookUpDataSuccess), Function.createDelegate(this, this.BindLookUpDataFailed));
    }
    catch(Ex)
    {
        alert(Ex);
    }
}

function BindLookUpDataSuccess()
{
    var strBookNames="";
    if(myColl.get_count()!=0)
    {
        var listEnumerator = this.myColl.getEnumerator();
        strBookNames+="<Select id='ddlCategory' width='158px'>";
        strBookNames+="<Option>Select Category</Option>";
        while (listEnumerator.moveNext())
        {
            var item = listEnumerator.get_current();
            var strItemID=item.get_item('ID');
            var strTitle=item.get_item('Title');
            strBookNames+="<Option Value='"+strItemID+"'>"+strTitle+"</Option>";
        }
        strBookNames+="</Select>";
    }
    document.getElementById("tdCategory").innerHTML=strBookNames;
}

function BindLookUpDataFailed(sender, args)
{
    alert('failed. Message:' + args.get_message());
}

_spBodyOnLoadFunctionNames.push("BindData");