//searchNavi

function setFocus(that) {  
	that._defaultValue = that.value;  
	that.value = '';  
	that.onblur = function() {  
		if( that.value === '' ) {  
			that.value = that._defaultValue;  
		}  
	}  
	that.onfocus = function() {  
		if( that.value === that._defaultValue ) {  
			that.value = '';  
		}  
	}  
}