function check_survey() { 




var len = document.add.checkbox_13.length;

flag = 0;

for(i=0;i < len;i++)
{
	//alert(eval(document.add.checkbox_13[i].checked));
	if(eval(document.add.checkbox_13[i].checked))
	{
		flag = 1;
		break;
	} 
}

if (flag == 0) {
	alert('Please answer all the questions in the survey.');
	return false;
}



var len = document.add.checkbox_14.length;

flag = 0;

for(i=0;i < len;i++)
{
	//alert(eval(document.add.checkbox_14[i].checked));
	if(eval(document.add.checkbox_14[i].checked))
	{
		flag = 1;
		break;
	} 
}

if (flag == 0) {
	alert('Please answer all the questions in the survey.');
	return false;
}


if(document.add.textarea_15.value == "") 
{
	alert('Please answer all the questions in the survey.');
	document.add.textarea_15.focus();
	return false;
}

document.add.submit(); 



}

 //funtion end