var xmlHttp;
var f_n;
var obj;
var ne;
var pr;
var div_id;

function showVal(link_type,f_name){
	xmlHttp=GetXmlHttpObject();
	if(f_name=="viewpoint"){
		obj = document.viewpoint;
		ne  = "next";
		pr  = "prev";
		div_id = "viewpoint_div";
	}
	if(f_name=="contributors"){
		obj = document.contributors;
		ne  = "next1";
		pr  = "prev1";
		div_id = "contributors_div";
	}
	val =Number(obj.val.value);
	co  =obj.co.value;
	art =obj.article.value;
	if(link_type == "next"){
		document.getElementById(ne).style.display = 'block';
		document.getElementById(pr).style.display = 'block';
		if(val == 10){
			document.getElementById(ne).style.display = 'none';
			return false;
		}
	val = val+1;
	}
	else  if(link_type == "prev"){
		document.getElementById(ne).style.display = 'block';
		if(val < 1){
			document.getElementById(pr).style.display = 'none';
			val = 0;
			return false;
		}else {
			val = val-1;
		}
	}else{ 
		document.getElementById(pr).style.display = 'none';
	}
	url = "process.php?val="+val+"&co="+co+"&art="+art;
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange = stateChanged;
	xmlHttp.send(null);
	return true;
}


function showVal2(link_type,f_name){
	xmlHttp=GetXmlHttpObject2();
	if(f_name=="viewpoint"){
		obj = document.viewpoint;
		ne  = "next";
		pr  = "prev";
		div_id = "viewpoint_div";
	}
	if(f_name=="contributors"){
		obj = document.contributors;
		ne  = "next1";
		pr  = "prev1";
		div_id = "contributors_div";
	}
	val =Number(obj.val2.value);
	co  =obj.co2.value;
	art =obj.article2.value;
	if(link_type == "next"){
		document.getElementById(ne).style.display = 'block';
		document.getElementById(pr).style.display = 'block';
		if(val == 10){
			document.getElementById(ne).style.display = 'none';
			return false;
		}
	val = val+1;
	}
	else  if(link_type == "prev"){
		document.getElementById(ne).style.display = 'block';
		if(val < 1){
			document.getElementById(pr).style.display = 'none';
			val = 0;
			return false;
		}else {
			val = val-1;
		}
	}else{ 
		document.getElementById(pr).style.display = 'none';
	}
	url = "process.php?val="+val+"&co="+co+"&art="+art;
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange = stateChanged2;
	xmlHttp.send(null);
	return true;
}

function stateChanged() {
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
		var result = xmlHttp.responseText;
        	if(result != ""){
			obj.val.value = val;
	   		obj.co.value = co;
			obj.article.value=art;
          	}
	document.getElementById(div_id).innerHTML=result; 
	} 
} 

function stateChanged2() {
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
		var result = xmlHttp.responseText;
        	if(result != ""){
			obj.val2.value = val;
	   		obj.co2.value = co;
			obj.article2.value=art;
          	}
	document.getElementById(div_id).innerHTML=result; 
	} 
} 

function GetXmlHttpObject(){
	var objXMLHttp=null
	if (window.XMLHttpRequest){
		objXMLHttp=new XMLHttpRequest()
	}
	else if (window.ActiveXObject){
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
} 

function GetXmlHttpObject2(){
	var objXMLHttp=null
	if (window.XMLHttpRequest){
		objXMLHttp=new XMLHttpRequest()
	}
	else if (window.ActiveXObject){
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
}