JS: detect caps lock

detect caps lock.js

	function checkCapslock (e) {
		var $el = $(this),
		hasLabel = $el.parent().find('.capslock-on-alert').length > 0 ? true : false;


		var kc = e.keyCode?e.keyCode:e.which;
		var sk = e.shiftKey?e.shiftKey:((kc == 16)?true:false);
		var isCaps = ((kc >= 65 && kc <= 90) && !sk)||((kc >= 97 && kc <= 122) && sk);

		if(isCaps && !hasLabel) {
			$el.after('<label for="password" generated="true" class="error capslock-on-alert">Klawisz CAPS LOCK jest włączony.</label>');
		} else if(!isCaps && hasLabel) {
			$('.capslock-on-alert').remove();
		}


	}


	$('input[type="password"]').live('keypress', checkCapslock);