function body_load(){
	master_extend();
}

function master_extend(){
	var g_master= document.getElementById("master");
	var g_right = document.getElementById("right");
	var g_cont 	= document.getElementById("content");
	var g_foot 	= document.getElementById("footer");
	var maxHeight = 0;

	if (g_right) maxHeight = Math.max(maxHeight, g_right.offsetHeight);
	if (g_cont && g_foot) maxHeight = Math.max(maxHeight, g_cont.offsetHeight + g_foot.offsetHeight);
	var newHeight = maxHeight;

	if ((g_master.offsetHeight) < newHeight){
		if(newHeight) g_master.style.height 	= (newHeight - 0)+"px";
	}
}

function validate_login_data(){
	var login = document.getElementById("login");
	if (login.value == ""){
		alert("Sie müssen eine Login (Email) angeben!");
		login.focus();
		return false;
	}	
	return true;
}