function TextTip(ctr)
{
    if(ctr.value.replace(/\s+/g,"").length==0)
    {
        ctr.value=ctr.tips;
        ctr.style.color='#999999';
    }
    else if(ctr.value==ctr.tips)
    {
        ctr.value='';
        ctr.style.color='#000000';
    }
    else
    {
        ctr.style.color='#000000';
    }
}