contentfeld = new Array("gdhc","gds1c","gds1_01c","gds1_02c","gds1_03c","gds1_04c","gds1_05c","gds1_06c","gds1_07c","gds1_08c","gds1_09c","gds1_10c","gds1_11c");

function showcontent(content)
{
	for (var i = 0; i <= 100; i++)
		{
			if (document.getElementById(contentfeld[i])) {document.getElementById(contentfeld[i]).style.display = "none";}
		}
	document.getElementById(content).style.display = "block";
}