var textHasBeenEntered = false;

function ghostSearch(id,defaultString)
{
    var search=document.getElementById(id);
    
    if(search!=null)
    {
        if(search.value == defaultString && !textHasBeenEntered)
        {
            search.value="";
            textHasBeenEntered=true;            
        }
        else if(search.value=="")
        {
            search.value=defaultString;
            textHasBeenEntered=false;
        }
    }
}