function getGender(){
form=document.voorspelsexeforminnerned; 
teststring = form.age.options[form.age.selectedIndex].value;
if (teststring == "000000000000" ){
	form.gender.value = "";
	return false
	}
testmonth = parseInt(form.month.options[form.month.selectedIndex].value)-1;
if (testmonth == -1 ){
	form.gender.value = "";
	return false
	}
gnd = teststring.charAt(testmonth);
if (gnd == "F")
	form.gender.value = "meisje wordt "
else if (gnd == "M")
	form.gender.value = "jongen wordt "
else form.gender.value = ""	

}