row count in UltraWebGrid from Java Script

protected void Page_Load(object sender, EventArgs e)
{

String Script = "javascript:function rowcount(gridname){var grid = igtbl_getGridById(gridname);var row =grid.Rows.length; if(row>0){var result =confirm('"+ GetGlobalResourceObject("Texts", "EmptyConfirmation") + "');return result;}else{return false;}}";
this.Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "InitVariable", Script, true);
uxEmptyTrash.Attributes.Add("onclick", "return rowcount('" + uxDocView.ClientID + "'+ '_uxBaseUltraWebGrid');");




}