var action_org;

function start() {
    if(action_org=document.getElementById("aspnetForm")) {
    	setDate(1,1);
		action_org=document.getElementById("aspnetForm").action;
    }
}

function addProp() {
	var sel = document.getElementById("property");
    var prop = sel.options[sel.selectedIndex].value;
    if (prop.length > 0) {
        document.getElementById("aspnetForm").action = action_org+"&property="+prop;
        return true;
    } else {
    	return false;
    }
}