Onclick event for div in jquery mobile opening two tabs in IPHONE, why?

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Mobile

jQuery

Iam developing an application with jquery mobile,

I have given onclick event for div,

It is opening two tabs in iphone, in other mobile devices it is working fine...


In ASPX Page

<div id="divMapCanvas" runat="server" style="width:100%;">
            </div>

IN CS PAGE::

divMapCanvas.Attributes.Add("OnClick", "javascript:return OpenDirectionsUrl('" + GetdirectionsURL + Storeaddress + "');");

Javascript::

function OpenDirectionsUrl(Url) {
    //alert("!");
    window.open(Url, "_blank");
    return false;
}