function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') { window.onload = func; }
    else { window.onload = function() { oldonload(); func(); } }
}

function addClass(element, value) {
    if (!element.className) { element.className = value; }
    else { element.className = element.className + " " + value; }
}

function highlightRows() {
    if(!document.getElementsByTagName) return false;
  	var tables = document.getElementsByTagName("table");
	for (var m = 0; m < tables.length; m++) {
		if (tables[m].className == "striped") {
            var tbodies = tables[m].getElementsByTagName("tbody");
            for (var j = 0; j < tbodies.length; j++) {
                var rows = tbodies[j].getElementsByTagName("tr");
                for (var i=0; i < rows.length; i++) {
                    rows[i].oldClassName = rows[i].className
                    rows[i].onmouseover = function() {
                        if (this.className.indexOf("selected") == -1) { addClass(this, "highlight"); }
                    }
                    rows[i].onmouseout = function() {
                        if( this.className.indexOf("selected") == -1) { this.className = this.oldClassName }
                    }
                }
            }
		}
	}
}

function selectRowCheckbox(row) {
	if (row.getElementsByTagName("input").size > 0) {
        var checkbox = row.getElementsByTagName("input")[0];
        if (checkbox.checked == true) { checkbox.checked = false; }
        else if (checkbox.checked == false) { checkbox.checked = true; }
    }
}

function lockRow() {
  	var tables = document.getElementsByTagName("table");
	for (var m = 0; m < tables.length; m++) {
		if (tables[m].className == "striped") {
            var tbodies = tables[m].getElementsByTagName("tbody");
            for (var j=0; j<tbodies.length; j++) {
                var rows = tbodies[j].getElementsByTagName("tr");
                for (var i=0; i<rows.length; i++) {
                    rows[i].oldClassName = rows[i].className;
                    rows[i].onclick = function() {
                        if (this.className.indexOf("selected") != -1) { this.className = this.oldClassName; }
                        else { addClass(this,"selected"); }
                        selectRowCheckbox(this);
                    }
                }
            }
		}
	}
}

function lockRowUsingCheckbox() {
	var tables = document.getElementsByTagName("table");
	for (var m = 0; m < tables.length; m++) {
		if (tables[m].className == "striped") {
			var tbodies = tables[m].getElementsByTagName("tbody");
			for (var j = 0; j < tbodies.length; j++) {
				var checkboxes = tbodies[j].getElementsByTagName("input");
				for (var i = 0; i < checkboxes.length; i++) {
					checkboxes[i].onclick = function(evt) {
						if (this.parentNode.parentNode.className.indexOf("selected") != -1) {
							this.parentNode.parentNode.className = this.parentNode.parentNode.oldClassName;
						}
                        else {
							addClass(this.parentNode.parentNode,"selected");
						}
						if (window.event && !window.event.cancelBubble) { window.event.cancelBubble = "true"; }
                        else { evt.stopPropagation(); }
					}
				}
			}
		}
	}
}

/* Generador de tablas, basado en código de AskTheCSSGuy (.com) */