function chkmenu(src){
	var sm = document.getElementById('submenu');
	var sm2 = document.getElementById('submenu2');
	sm.style.display = 'none';
	sm2.style.display = 'none';
	if(src == 'gradeH'){
		sm.style.display = 'block';
	}
	if(src == 'gradeO'){
		sm.style.display = 'none';
	}
	if(src == 'subH'){
		sm2.style.display = 'block';
	}
	if(src == 'subO'){
		sm2.style.display = 'none';
	}
}

function chgSubject(src, val){
	var subj = document.getElementById('ancSubject');
	var grade = document.getElementById('ancGrade');
	
	var txtA = document.getElementById('txtSubject');
	var txtB = document.getElementById('txtGrade');

	if(src == 'subject'){
		subj.innerHTML = '';
		subj.innerHTML = val + ' »';
		txtA.value = val;
	}
	
	if(src == 'grade'){
		grade.innerHTML = '';
		grade.innerHTML = val + ' »';
		txtB.value = val;
	}
}

function stdpost(){
	var tSubj = document.getElementById('txtSubject');
	var tGrd = document.getElementById('txtGrade');
	//document.write('');
	
	if(tSubj.value == 'All Subjects' && tGrd.value == 'All Grade'){
		document.getElementById('AllPost').style.display = 'block';
		document.getElementById('post1').style.display = 'none';
		document.getElementById('post2').style.display = 'none';
		document.getElementById('post3').style.display = 'none';
		document.getElementById('postnull').style.display = 'none';
	}
	else if(tSubj.value == 'English' && tGrd.value == 'Grade 4' || tGrd.value == 'All Grade'){
		document.getElementById('AllPost').style.display = 'none';
		document.getElementById('post1').style.display = 'block';
		document.getElementById('post2').style.display = 'none';
		document.getElementById('post3').style.display = 'none';
		document.getElementById('postnull').style.display = 'none';
	}
	else if(tSubj.value == 'Mathematics' && tGrd.value == 'Grade 7'){
		document.getElementById('AllPost').style.display = 'none';
		document.getElementById('post1').style.display = 'none';
		document.getElementById('post2').style.display = 'block';
		document.getElementById('post3').style.display = 'none';
		document.getElementById('postnull').style.display = 'none';
	}
	else if(tSubj.value == 'Global Studies' && tGrd.value == 'Grade 5'){
		document.getElementById('AllPost').style.display = 'none';
		document.getElementById('post1').style.display = 'none';
		document.getElementById('post2').style.display = 'none';
		document.getElementById('post3').style.display = 'block';
		document.getElementById('postnull').style.display = 'none';
	}
	else{
		document.getElementById('AllPost').style.display = 'none';
		document.getElementById('post1').style.display = 'none';
		document.getElementById('post2').style.display = 'none';
		document.getElementById('post3').style.display = 'none';
		document.getElementById('postnull').style.display = 'block';
	}
}