function calcHeights()
	{

  var divH = new Array(3);	
	var left = 0;
	var hasLeft;
  var right = 0;
  var hasRight;
	var min = 300;
  var uniformHeight = 0;
	
	if($("#left").length > 0)
	   {
	   hasLeft = 1;
	   $("#left").css("height","auto");
     left = $("#left").height();
     }
	if($("#right").length > 0)
	   {
	   hasRight = 1;
	   $("#right").css("height","auto");
     right = $("#right").height();
     }
  
  $("#content").css("height","auto");
  var content = $("#content").height();
  
  divH[0] = right;
  divH[1] = left;
  divH[2] = content;

	divH.sort(sortNumber);
	uniformHeight += (divH[2] < min) ? min : divH[2];
  //alert(uniformHeight);
  if(hasLeft == 1 && left < uniformHeight)
    { 
    $("#left").css("height",uniformHeight);
    }
  if(hasRight == 1 && right < uniformHeight)
    {
    $("#right").css("height",uniformHeight);
    }
  if(content < uniformHeight)
    {
    $("#content").css("height",uniformHeight);
    }  
	}
	
function sortNumber(a, b)
	{
	return a - b;
	}