function cleanField(){
		fieldId = document.getElementById('keyword');
		var baseValue = fieldId.getAttribute('basevalue');
		if(fieldId.value == baseValue){
			fieldId.value = '';
		}else if(fieldId.value == ''){
			fieldId.value = baseValue;
		}else{
			return false;
		}		
	}
	
	
	function checkInput(){

		var fieldId =  document.getElementById('keyword');
		var baseValue = fieldId.getAttribute('basevalue');
		var bttn = document.getElementById('submitbttn');

		if((fieldId.value=='') || (fieldId.value==' ') || (fieldId.value==baseValue)){
			bttn.setAttribute('disabled', true);	
			bttn.src = "/images/search_submit_disab.gif";	
			bttn.style.cursor = "default";
			
		}else{
			bttn.removeAttribute('disabled');	
			bttn.src = "/images/search_submit.gif";
			bttn.style.cursor = 'pointer';
		}
	}