function toggle_childs(id) {
	var child_object = document.getElementById(id);
	var img_child_object = document.getElementById("img_" + id);
	if (child_object.style.display == 'none') {
		child_object.style.display = '';
		img_child_object.src = 'images/icons/open.gif';
	} else {
		child_object.style.display = 'none';
		img_child_object.src = 'images/icons/closed.gif';
	}
}
//============================================================================================================
//============================================================================================================
function onlyNumbers(input) {
	var keynum;
	var keychar;
	var numcheck;
	if(window.event) { // IE
		keynum = input.keyCode;
	} else if (input.which) {  // Netscape/Firefox/Opera
		keynum = e.which;
	}
	keychar = String.fromCharCode(keynum);
	numcheck = /^([0-9])$/;
	//^[0-9]+$/m;
	//^([a-zA-Z0-9@*#]{4,15})$/
	return numcheck.test(keychar);
}