function resize() {
//    window.outerHeight = 640;                                                                                             
//    window.document.body.offsetHeight=640;                                                                                 
			       
}
		function expand_top(arg) {
			if (arg=='positionen') {
				document.getElementById("td_pos").className = "top_explain";
				document.getElementById("td_pers").className = "top_explain_hidden";
				document.getElementById("td_sekt").className = "top_explain_hidden";
			}
			if (arg=='personen') {
				document.getElementById("td_pos").className = "top_explain_hidden";
				document.getElementById("td_pers").className = "top_explain";
				document.getElementById("td_sekt").className = "top_explain_hidden";
			}
			if (arg=='sektion') {
				document.getElementById("td_pos").className = "top_explain_hidden";
				document.getElementById("td_pers").className = "top_explain_hidden";
				document.getElementById("td_sekt").className = "top_explain";
			}
			if (arg=='none') {
				document.getElementById("td_pos").className = "top_explain_hidden";
				document.getElementById("td_pers").className = "top_explain_hidden";
				document.getElementById("td_sekt").className = "top_explain_hidden";
			}

		
		}