function rewriteSitemap() 
{
	root = document.getElementById("sitemap");
	countMainNav = root.childNodes.length;
	breakAfter = Math.floor(countMainNav / 2);

if(navigator.appName.indexOf("Explorer") != -1)
{
	startColumn1 = 0;
	endColumn1 = startColumn1+breakAfter;
	startColumn2 = endColumn1
	endColumn2 = countMainNav;
}
else
{
	startColumn1 = 0
	endColumn1 = startColumn1+breakAfter;
	startColumn2 = endColumn1
	endColumn2 = countMainNav;
}
	column1 = document.createElement("div");
	column1.setAttribute("id","column_1");
	column2 = document.createElement("div");
	column2.setAttribute("id","column_2");
	mainNavs = new Array(countMainNav);
	for (i=0;i<countMainNav;i++) {
		removeNode = root.firstChild;
		mainNavs[i] = root.removeChild(removeNode);
	}
	for (i=startColumn1;i<endColumn1;i++) {
		column1.appendChild(mainNavs[i]);
	}
	for (i=startColumn2;i<endColumn2;i++) {
		column2.appendChild(mainNavs[i]);
	}
	root.appendChild(column1);
	root.appendChild(column2);
}