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

function addDropdownBehavior() {
	dropdown = document.getElementById("shortcut_products");
	dropdown.onchange = function() {
		window.location = "/index.php?id="+dropdown.value;
	}
}

addLoadEvent(addDropdownBehavior);