function compareItems(param){
	check_arr = document.getElementsByName("compare_check");
	var marks = "";
	
	for (i=0; i<check_arr.length; i++){
		if (check_arr[i].checked){
			marks += check_arr[i].value + "|";
		}
	}
	if (marks ==""){
		var conf = confirm("Товары не выбраны");
		return false;
	}else{
		marks = marks.substring((marks.length - 1), -1);
		var url = "/compare_items/51/55.html?cmp_marks=" + marks;
		var params = "width=800,height=600,scrollbars=yes,resizable=yes";
		myWindow = window.open(url, "compare", params);
		myWindow.focus();
		return true;
	}
}