set textbox's next button click

        <pre data-sub="prettyprint:_">
        string script = @"
        function clickButton(e, buttonid)
        {
        var bt = document.getElementById(buttonid);
        if (typeof bt == 'object')
        {
        if (navigator.appName.indexOf('Microsoft Internet Explorer')>(-1)){
        if (event.keyCode == 13){
        bt.click();
        return false;
        }
        }
        else
        {
        if (e.keyCode == 13)
        {
        bt.click();
        return false;
        }
        }
        }
        } ";
        Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "search", script, true);
        if (this.Request["tab"] == null || this.Request["tab"] == "All Resources")
        {
        this.txtGeneralSearch.Attributes.Add("onkeypress", "return clickButton(event,'" + this.btnSearch.ClientID + "')");
        }
        </pre>