// to hide elements displayed by JavaScript
document.body.className = 'js';

/** Toggle visibility
* @param string
* @return boolean
*/
function toggle(id) {
	var el = document.getElementById(id);
	el.className = (el.className == 'hidden' ? '' : 'hidden');
	return true;
}

/** Set permanent cookie
* @param string
* @param number
* @param string optional
*/
function cookie(assign, days, params) {
	var date = new Date();
	date.setDate(date.getDate() + days);
	document.cookie = assign + '; expires=' + date + (params || '');
}

/** Verify current Adminer version
*/
function verifyVersion() {
	cookie('adminer_version=0', 1);
	var script = document.createElement('script');
	script.src = 'https://adminer.svn.sourceforge.net/svnroot/adminer/trunk/version.js';
	document.body.appendChild(script);
}

/** Check all elements matching given name
* @param HTMLInputElement
* @param RegExp
*/
function formCheck(el, name) {
	var elems = el.form.elements;
	for (var i=0; i < elems.length; i++) {
		if (name.test(elems[i].name)) {
			elems[i].checked = el.checked;
		}
	}
}

/** Uncheck single element
* @param string
*/
function formUncheck(id) {
	document.getElementById(id).checked = false;
}

/** Get number of checked elements matching given name
* @param HTMLInputElement
* @param RegExp
* @return number
*/
function formChecked(el, name) {
	var checked = 0;
	var elems = el.form.elements;
	for (var i=0; i < elems.length; i++) {
		if (name.test(elems[i].name) && elems[i].checked) {
			checked++;
		}
	}
	return checked;
}

/** Select clicked row
* @param MouseEvent
*/
function tableClick(event) {
	var el = event.target || event.srcElement;
	while (!/^tr$/i.test(el.tagName)) {
		if (/^(table|a|input)$/i.test(el.tagName)) {
			return;
		}
		el = el.parentNode;
	}
	el = el.firstChild.firstChild;
	el.click && el.click();
	el.onclick && el.onclick();
}



/** Add row in select fieldset
* @param HTMLSelectElement
*/
function selectAddRow(field) {
	var row = field.parentNode.cloneNode(true);
	var selects = row.getElementsByTagName('select');
	for (var i=0; i < selects.length; i++) {
		selects[i].name = selects[i].name.replace(/[a-z]\[[0-9]+/, '$&1');
		selects[i].selectedIndex = 0;
	}
	var inputs = row.getElementsByTagName('input');
	if (inputs.length) {
		inputs[0].name = inputs[0].name.replace(/[a-z]\[[0-9]+/, '$&1');
		inputs[0].value = '';
		inputs[0].className = '';
	}
	field.parentNode.parentNode.appendChild(row);
	field.onchange = function () { };
}