var arr = new Array("ma","mns","jdp","mnshs","mss","requirements");

var gradcount = 1;

var message=new Array();  //include the div ids of all grad students in this array
  message[0]="grad1"
  message[1]="grad2"
  message[2]="grad3"
  message[3]="grad4"

 
$(document).ready(function()
{
for ( var i =0;i<arr.length;i++)
{
	var na = "#" + arr[i];
	if ( i == 0 )
	$(na).show();
	else
	$(na).hide();
}
});

function show(divid)
{
	for ( var i =0;i<arr.length;i++)
	{
		var g = "#" + arr[i];
		$(g).hide();
	}		
	var idiv = "#" + divid;
	$(idiv).show();	
}

function changediv(goto)
{
	//alert(goto);
	if ( goto == "next" )
	{
		if (message.length > gradcount) 
		{     
                        var mem1 = "#" + message[gradcount-1];  
 			var mem2 = "#" + message[gradcount];
			$(mem1).slideUp();
        		$(mem2).css("display","block");
                  	//alert($("#nt").css("color"));
			$("#nt").css("cursor","default");
			$("#pv").css("cursor","pointer");
			//$("#nt a").css("color","black");
			gradcount++;
		}
		else
		{
			return;
		}
	}
	if ( goto == "prev" )
	{
		if (gradcount > 1) 
		{
			var mem1 = "#" + message[gradcount-2];  
 			var mem2 = "#" + message[gradcount-1];
			$(mem2).slideUp();			
			$(mem1).show("fast");
			$("#pv").css("cursor","default");
			//$("#pv a").css("color","black");
			$("#nt").css("cursor","pointer");
			gradcount--;
		}
		else
		{
			return;
		}
	}
}