function checkForm() {
	var row; 
	for (row = 0; row < formFields.length; ++row)
	{
	    var fieldType = formFields[row][1];
        
        var formElement = document.getElementById(formFields[row][0]);
        var error = '';
    	switch(fieldType)
        {
            case 'Textbox': 
              error += checkText(formElement)
              break;
            case 'TextArea':
              error += checkText(formElement)
              break;
            case 'Checkbox':
              error += checkCheckbox(formElement)
              break;
            case 'RadioButtonList':
              error += checkText(formElement)
              break;
      }
	}

	if (error != '') {
        return false;
    }
    return true;
}

function checkText(formElement) {
    if(formElement.value == '')
    {
        return 'false';
    }
    return '';
}

function checkCheckbox(formElement) {
    if (formElement.checked)
        return '';
    return 'false';
}