function checkFormFields(test_type) {

	missinginfo = "";

	if (test_type==1){
		var questions = new Array(2, 9, 11, 12, 13, 14, 16, 24, 32, 34, 38);
	}
	else if (test_type==4){
		var questions = new Array(52, 53);
	}

	for (var counter=0; counter<questions.length; counter++){
		
		var i = questions[counter];
		var fld_id = "q"+i;
		var fld_label = counter+1;
		//alert(fld_id);
		//question id's 10, 12, 13, 14, 17, 39, 53, 58, 68, 69, 70 are memo fields, so check input value
		//questions 53, 68 are only required based on the answer to previous question
		if ( (i==10) || (i==12) || (i==13) || (i==14) || (i==17) || (i==39) || (i==53) || (i==58) || (i==68) ){

			if (i==53){
				// if "do not wish to partcipate is checked", q53 is mandatory
				if (document.form.q52[2].checked && document.form[fld_id].value == ""){
					missinginfo += "\n   - " + fld_label;}
			}
			else if (i==68){
				// if "no" is checked for q67, q68 is mandatory
				if (document.form.q67[1].checked && document.form[fld_id].value == ""){
					missinginfo += "\n   - " + fld_label;}
			}			
			else if (document.form[fld_id].value == "") 
				{missinginfo += "\n   - " + fld_label;}
		}
		
		// else question is a radiobutton, so check if a button in the group is checked
		else{
			// q_id=36 is not required if q35=no
			if (i==36 && document.form.radio113.checked) { 
				// do nothing 
			}
			else {
				var btn = valButton(document.form[fld_id]);
				if (btn == null) {missinginfo += "\n   - " + fld_label;	}	
			}
		}		
	} // end for i
	
	if (missinginfo != "") {
		if (test_type==4&&document.form.q52[3].checked)
			missinginfo = "Please tell us why you do not wish to participate in the PI Phase."
		else if (test_type==4)
			missinginfo = "Please select an option."
		else
			missinginfo = "Please provide answers to questions" + missinginfo + "\n and submit again.";
		alert(missinginfo);
		return false;
	}
	else 
		return true;
		
}  // end function CheckFormFields(testtype)


// Radio Button Validation
// copyright Stephen Chapman, 15th Nov 2004,14th Sep 2005
// you may copy this function but please keep the copyright notice with it

function valButton(btn) {
    var cnt = -1;
    for (var i=btn.length-1; i > -1; i--) {
        if (btn[i].checked) {cnt = i; i = -1;}
    }
    if (cnt > -1) return btn[cnt].value;
    else return null;
}