function movePage_a(){
	var targeturl=document.getElementById('id_a').value;
	document.location = targeturl;
}

function movePage_b(){
	var targeturl=document.getElementById('id_b').value;
	document.location = targeturl;
}

function movePage_c(){
	var targeturl=document.getElementById('id_c').value;
	document.location = targeturl;
}