$(document).ready(function(){

Behaviour.register({
'#Form_TechDocSearchForm_Keywords' : {
onfocus : function() {
         if(this.value == 'Keywords') this.value = '';
},
onblur : function() {
   if(this.value == '') this.value = 'Keywords';
}
},
'#Form_TechDocSearchForm' : {
	onsubmit : function () {
		if($('Form_TechDocSearchForm_Keywords').value == 'Keywords')
			$('Form_TechDocSearchForm_Keywords').value = '';
	}
}
}); 
   });