function IsDate(dateval){
    var arr = new Array();
    
    if(dateval.indexOf("-") != -1){
        arr = dateval.toString().split("-");
    }else if(dateval.indexOf("/") != -1){
        arr = dateval.toString().split("/");
    }else{
        return false;
    }
    
    //yyyy-mm-dd || yyyy/mm/dd
    if(arr[0].length==4){
        var date = new Date(arr[0],arr[1]-1,arr[2]);
        if(date.getFullYear()==arr[0] && date.getMonth()==arr[1]-1 && date.getDate()==arr[2]){
            return true;
        }
    }
    //dd-mm-yyyy || dd/mm/yyyy
    if(arr[2].length==4){
        var date = new Date(arr[2],arr[1]-1,arr[0]);
        if(date.getFullYear()==arr[2] && date.getMonth()==arr[1]-1 && date.getDate()==arr[0]){
            return true;
        }
    }
    //mm-dd-yyyy || mm/dd/yyyy
    if(arr[2].length==4){
        var date = new Date(arr[2],arr[0]-1,arr[1]);
        if(date.getFullYear()==arr[2] && date.getMonth()==arr[0]-1 && date.getDate()==arr[1]){
            return true;
        }
    }
    
    return false;
}