function validateForm(formObj) {

	

	//Remove all alerts.

	clearErrors();

	

	//Loop through the required fields and make sure they are not empty.

	if ($("#required_fields").length > 0) {

		var reqFields = $("#required_fields").attr("value");	

		reqFields = reqFields.split(",");

		var errorMessage = "";

		var numErrors = 0;

		for (field in reqFields) {

			var fieldID = jQuery.trim(reqFields[field]);

			fieldObj = $("#"+fieldID, formObj);

			if (fieldObj.length) {

				fieldType = document.getElementById(fieldID).nodeName.toLowerCase();

				if (fieldType == "input") {

					fieldType = document.getElementById(fieldID).type;

				}

				if (fieldType == "td") {

					fieldType = "select-group";

				}

				

				switch(fieldType) {			

					default:

						var fieldValue = fieldObj.attr("value");

					

						if (!fieldValue) {

							addError(fieldObj, fieldType);

						}

						

						//If the form field name contains "email", we 

						//will do an email address format validation.

						var fieldName = fieldObj.attr("name");						

						var containsEmail = fieldName.indexOf("email");

						if (containsEmail != -1) {

							if (!isValidEmail(fieldValue)) {

								addError(fieldObj, fieldType);

							}

						}						

						

						break;

						

					case "hidden":

						break;

						

					case "select-group":

						var fieldObj = $("input:first", fieldObj);					

						var fieldName = fieldObj.attr("name");

						var fieldValue = $('input[name="'+fieldName+'"]:checked').val(); 

						if (!fieldValue) {

							addError(fieldObj, fieldType);

						}

						break;

						

					/*For files, allow the form to pass validation if a file preview is available.

					This means the user previously uploaded a file, so another upload is not

					necessary. */ 

					case "file":

						var fieldValue = fieldObj.attr("value");

						

						//Is a file preview available?

						//Is so, allow this field to validate.

						var preview = fieldObj.next("span.filePreview");

						if (preview.length) {

							break;

						

						//Otherwise, check for a value.

						} else if (!fieldValue) {

							addError(fieldObj, fieldType);

						}					

						break;

				}

			}

		}

	}

	

	//Were there any errors?

	if (numErrors > 0) {

		if ($("div.errorWrap").length == 0) {

			formObj.parent().prepend("" +

					"<div class='errorWrap'>" +

					"	<h3>Please complete the highlighted fields.</h3>" +

					"</div>");

		}

		return false;

	} else {

		return true;

	}

	

	//Add some sort of visual display to let the user know there was an error.

	function addError(fieldObj, fieldType) {

		var containerObj = $(fieldObj.parents(".field"));

		hasError = containerObj.hasClass("alerted");

		if (hasError == false) {

			containerObj.addClass("alerted");

		}		

		numErrors += 1;

	}

	

	function clearErrors() {

		$(".alerted").removeClass("alerted");

	}

	

	function isValidEmail(str) {



		var at="@"

		var dot="."

		var lat=str.indexOf(at)

		var lstr=str.length

		var ldot=str.indexOf(dot)

		if (str.indexOf(at)==-1){

		   return false;

		}

		

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){

		   return false;

		}

		

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){

		    return false;

		}

		

		if (str.indexOf(at,(lat+1))!=-1){

			return false;

		}

		

		if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){

			return false;

		}

				

		if (str.indexOf(dot,(lat+2))==-1){

			return false;

		}

		

		if (str.indexOf(" ")!=-1){

			return false;

		}

		

		return true;

		

	}

}