function checkdata(form){
	var errorMessage = false;
	var errorValid1 = false;
	var errorValid2 = false;
	var errorValid3 = false;
	var errorValid4 = false;
	var errorValid5 = false;
	var errorValid6 = false;
	
	var errorValid7 = false;
	var errorValid8 = false;
	var errorValid9 = false;
	var errorValid10 = false;
	var errorValid11 = false;
	var errorValid12 = false;
	
	var errorValid13 = false;
	var errorValid14 = false;
	var errorValid15 = false;
	var errorValid16 = false;
	var errorValid17 = false;
	var errorValid18 = false;
	
	var question1 = form.question1;
	var question2 = form.question2;
	var question3 = form.question3;
	var question4 = form.question4;
	var question5 = form.question5;
	var question6 = form.question6;
	
	var question7 = form.question7;
	var question8 = form.question8;
	var question9 = form.question9;
	var question10 = form.question10;
	var question11 = form.question11;
	var question12 = form.question12;
	
	var question13 = form.question13;
	var question14 = form.question14;
	var question15 = form.question15;
	var question16 = form.question16;
	var question17 = form.question17;
	var question18 = form.question18;
	
	for(var i=0; i<question5.length; i++){
		if(question1[i].checked == true){
			errorValid1 = true;
		}else{
			errorMessage = '請把問題填寫完整';
		}
		if(question2[i].checked == true){
			errorValid2 = true;
		}
		if(question3[i].checked == true){
			errorValid3 = true;
		}
		if(question4[i].checked == true){
			errorValid4 = true;
		}
		if(question5[i].checked == true){
			errorValid5 = true;
		}
		if(question6[i].checked == true){
			errorValid6 = true;
		}
		if(question7[i].checked == true){
			errorValid7 = true;
		}
		if(question8[i].checked == true){
			errorValid8 = true;
		}
		if(question9[i].checked == true){
			errorValid9 = true;
		}
		if(question10[i].checked == true){
			errorValid10 = true;
		}
		if(question11[i].checked == true){
			errorValid11 = true;
		}
		if(question12[i].checked == true){
			errorValid12 = true;
		}
		if(question13[i].checked == true){
			errorValid13 = true;
		}
		if(question14[i].checked == true){
			errorValid14 = true;
		}
		if(question15[i].checked == true){
			errorValid15 = true;
		}
		if(question16[i].checked == true){
			errorValid16 = true;
		}
		if(question17[i].checked == true){
			errorValid17 = true;
		}
		if(question18[i].checked == true){
			errorValid18 = true;
		}
	}
	
	//alert(errorValid6 == '' && errorValid5 == '');
	if(!errorValid6 || !errorValid5 ||!errorValid4 || !errorValid3 ||!errorValid2 || !errorValid1
	  || !errorValid7 || !errorValid8 ||!errorValid9 || !errorValid10 ||!errorValid11 || !errorValid12
	  || !errorValid13 || !errorValid14 ||!errorValid15 || !errorValid16 ||!errorValid17 || !errorValid18){
		alert(errorMessage);
		return false;
	}
	return true;
 }