/**
  *toggle input adds and removeds a default value from an input
  *_field is the input to target
  *_value = the value the use as a default
  *_size true = resize input , false = dont resize
  */
function toggle_input(_field,_value,_size)
{
	_size = _size != undefined ? _size : false;
	function search_value()
	{
	    if(document.getElementById(_field))
	    {
	        var qu = document.getElementById(_field);
	        qu.value=_value;
	        qu.onfocus = get_that;
	        qu.onblur = get_that;
	    }
	}
	function get_that(e)
	{
	    e = ( e ) ? e : event;
	    var el = e.target || e.srcElement;
	    var val = el.value;
	    if(val == '')
	    {
	        el.value = _value;
	        if(_size)
	        {
	        	el.size = 21;
	        }
	    }
	    else if(val == _value)
	    {
	        el.value='';
	        if(_size)
	        {
	        	el.size=30;
	        }
	    }
	}
	search_value();
}