function clearErrorMessages(form) {
	var divs = form.getElementsByTagName("div");
    var paragraphsToDelete = new Array();

    for(var i = 0; i < divs.length; i++) {
        var p = divs[i];
        if (p.getAttribute("errorFor")) {
            paragraphsToDelete.push(p);
        }
    }
    for (var i = 0; i < paragraphsToDelete.length; i++) {
        var r = paragraphsToDelete[i];
        var parent = r.parentNode;
        parent.removeChild(r);
    }
}
function clearErrorLabels(form) {
    var labels = form.getElementsByTagName("label");
    for (var i = 0; i < labels.length; i++) {
        var label = labels[i];
        if (label) {
            if(label.getAttribute("class") == "errorLabel"){
                label.setAttribute("class", "label");
                label.setAttribute("className", "label");
            }
        }
    }
}
function addError(e, errorText) {
    try {
        var ctrlDiv = e.parentNode; // wwctrl_ div or span
        var enclosingDiv = ctrlDiv.parentNode; // wwgrp_ div

		if (!ctrlDiv || (ctrlDiv.nodeName != "DIV" && ctrlDiv.nodeName != "SPAN") || !enclosingDiv || enclosingDiv.nodeName != "DIV") {
			alert("do not validate:" + e.id);
			return;
		}
        var label = enclosingDiv.getElementsByTagName("label")[0];
		if (label) {
	        label.setAttribute("class", "errorLabel"); 
	        label.setAttribute("className", "errorLabel");
	    }
		var firstDiv = enclosingDiv.getElementsByTagName("div")[0]; 
		if (!firstDiv) {
			firstDiv = enclosingDiv.getElementsByTagName("span")[0];
		}
        var error = document.createTextNode(errorText);
        var errorDiv = document.createElement("div");
        errorDiv.setAttribute("class", "errorMessage");
        errorDiv.setAttribute("className", "errorMessage");
        errorDiv.setAttribute("errorFor", e.id);;
        errorDiv.appendChild(error);
        enclosingDiv.insertBefore(errorDiv, firstDiv);
    } catch (e) {
        alert(e);
    }
}