function changeContentBody(link)
{
	content1   = document.getElementById("content_body1");
	content2   = document.getElementById("content_body2");
	content3   = document.getElementById("content_body3");
	content4   = document.getElementById("content_body4");
	newContent = document.getElementById(link.href.replace(/.*content_body/,"content_body"));

	content1.style.display = "none";
	content2.style.display = "none";
	content3.style.display = "none";
	content4.style.display = "none";
	newContent.style.display = "block";

	return false;
}

window.onload=function()
{
	link = new Object();
	if (window.location.href.indexOf("?content_body1") >= 0)
		link.href = "#content_body1";
	if (window.location.href.indexOf("?content_body2") >= 0)
		link.href = "#content_body2";
	if (window.location.href.indexOf("?content_body3") >= 0)
		link.href = "#content_body3";
	if (window.location.href.indexOf("?content_body4") >= 0)
		link.href = "#content_body4";
	changeContentBody(link);
}