function selectall() {
	var checkboxArray = document.getElementsByName("R");
	for (var i=0; i<checkboxArray.length; i++) {
		checkboxArray[i].checked = true;
	}
}

function unselectall() {
	var checkboxArray = document.getElementsByName("R");
	for (var i=0; i<checkboxArray.length; i++) {
		checkboxArray[i].checked = false;
	}
}

function performCompare() {
	var url = "http://" + document.domain + "/webapp/wcs/stores/servlet/ProductCompareDisplay?storeId=10001&langId=-1&catalogId=10751";
	var parameters = "";
	var checkboxArray = document.getElementsByName("R");
	for (var i=0; i<checkboxArray.length; i++) {
		if (checkboxArray[i].checked == true) {
			parameters = parameters + "+" + checkboxArray[i].value;
		}
	}
	url = url + "&R=" + parameters;
	var compareWindow = window.open(url);
}