var style1 = ' style1';
var style2 = ' style2';
var style3 = ' style3';

function flexible() {
	var column = document.getElementById('column');
	var column1 = document.getElementById('column1');
	var content = document.getElementById('content');
	content.className = 'content';
	
	if(!column && !column1){
		content.className = content.className + style3;
	} else if(!column){
		content.className = content.className + style1;
	} else if (!column1){
		content.className = content.className + style2;
	}
}

if (window.addEventListener) window.addEventListener("load", flexible, false);
else if (window.attachEvent) window.attachEvent("onload", flexible);