// JavaScript Document
	function showPersonalInfo(){
		var validate = validation_ans();
		if( validate == ""){
			document.getElementById("questions").style.display = "none";
			document.getElementById("personalInfo").style.display = "block";
		}else{
			alert(validate);
		}
	}	
	
	function emailCheck(emailStr){
		if(emailStr.length > 0){
			var r1 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
			if (r1.test(emailStr) == true){
				return true;
			}		
		}		
		return false;
	}
		
	function validation(){
		if(validation_ans() == ""){
			return true;
		}else{
			return false;
		}
	}
	function validation_ans(){
		var result = 0;
		var errMsg = "";
		var errMsgHTML = "";
		//Must select ans
		ans = document.getElementsByName("answer")
		for(i=0;i<ans.length;i++){
			//alert(ans(i).checked);
			if(ans[i].checked == false){
				result++;
			}
			//alert(result);
		}	
		if(result >= 3){
			errMsg += "請選擇答案。\n";
			//errMsgHTML += "請選擇答案。<br />";
			
			return errMsg;
			
		}else{
			return "";
		}
		
		
	}
	
	function form1Submit(){
		errMsg = validation_ans();
		if(errMsg == ""){			
			document.getElementById('form1').submit();
		}else{
			alert(errMsg);
		}
	}