function getLongest() {
 	colLength = new Array(2);
 	colLength[0] = document.getElementById("content").offsetHeight;
 	colLength[1] = document.getElementById("right_sidebar").offsetHeight;
 	colLength[2] = document.getElementById("left_id").offsetHeight+100;
	colLength.sort();
	colLength.reverse();
 	return colLength[0];
}

function setheight()
{ 
var heightw=getLongest();
if (heightw>1850) 
{ heightw=heightw+50;
	document.getElementById('content').style.height=heightw-100+"px";
	document.getElementById('right_sidebar').style.height=heightw-100+"px";
	document.getElementById('left_id').style.height=heightw+"px";
	document.getElementById('footer').style.top=heightw+50+"px";
}
else
{
	document.getElementById('content').style.height="1250px";
	document.getElementById('right_sidebar').style.height="1270px";
	document.getElementById('left_id').style.height="1270px";
	document.getElementById('footer').style.top = "2250px";
}
}