wFORMS.functionName_formValidation = "doPostBack";	
function doPostBack(e)
{ 
	if(!e) e = window.event;    
	if(wFORMS.behaviors['validation'].run(e))
	{
		var passwordField = document.getElementById('password');
		var confirmField  = document.getElementById('confirmPassword');
		
		if(passwordField.value != confirmField.value) {
			var errorMessage = "The passwords don't match.";
			wFORMS.behaviors['validation'].showError(confirmField, wFORMS.behaviors['validation'].errMsg_passwdmatch);
			return wFORMS.helpers.preventEvent(e);
		}
		document.getElementById('UserFechaNacimiento').disabled = false;
		return true;
	}
}