[Plugin: Surveys] Required fileds script

Hi,
Maybe for someone this script will be helpful.

It’s using jquery in compatibility mode ($j) to verify is user fill all required fields. In question needs to be <span> tag with “*”. Now is working only with radio input and text area.

var reqQuestion = new Array();
		var reqOK=0;

		$j('#survey-action-button').attr('disabled','disabled');
		$j('<p></p>').insertBefore('#survey-action-button').text('Please fill all requied fileds').addClass('infoMes');

		$j('.survey-question').each(function(){
			if($j(this).find('span').text()=='*'){
				$j(this).addClass('req');
			}
		});

		function checkSurvey(){
			reqOK=0;
			$j('.req').each(function(i){
				reqQuestion[i]=0;

				if($j(this).find('.user-answer').length>0){
					var valtext = $j(this).find('.user-answer').val();
					if(valtext!=''){
						reqQuestion[i]=1;

					}
					else reqQuestion[i]=0;
				}
				else {
					if($j(this).find('.answer').is(':checked')){
						reqQuestion[i]=1;
					}
					else reqQuestion[i]=0;
				}

				reqOK+=reqQuestion[i];
			});
			if(reqOK==reqQuestion.length){
				$j('#survey-action-button').removeAttr('disabled');
				$j('.infoMes').text('');
			}
			else{
				$j('#survey-action-button').attr('disabled','disabled');
				$j('.infoMes').text('Please fill all requied fileds');
			}
		}

		$j('.answer').change(function(){
			checkSurvey();
		});
		$j('.user-answer').keyup(function(){
			checkSurvey();
		});

http://wordpress.org/extend/plugins/surveys/