// validates that the field value string has one or more characters in it
function isNotEmpty(elem) {
	var str = elem.value;
    var re = /.+/;
    if(!str.match(re)) {
        alert("Please fill in the required field.");
        setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
        return false;
    } else {
        return true;
    }
}
//validates that the entry is a positive or negative number
function isNumber(elem) {
	var str = elem.value;
    var re = /^[-]?\d*\.?\d*$/;
    str = str.toString();
    if (!str.match(re)) {
        alert("Enter only numbers into the field.");
        setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
        return false;
    }
    return true;
}
// validates that the entry is 16 characters long
function isLen16(elem) {
	var str = elem.value;
    var re = /\b.{16}\b/;
    if (!str.match(re)) {
        alert("Entry does not contain the required 16 characters.");
        setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
        return false;
    } else {
        return true;
    }
}
// validates that the entry is formatted as an e-mail address
function isEMailAddr(elem) {
	var str = elem.value;
    var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
    if (!str.match(re)) {
        alert("Verify the e-mail address format.");
        setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
        return false;
    } else {
        return true;
    }
}
// validate that the user made a selection other than default
function isChosen(select) {
    if (select.selectedIndex == 0) {
        alert("Please make a choice from the list.");
        return false;
    } else {
        return true;
    }
}

// validate that the user has checked one of the radio buttons
function isValidRadio(radio) {
    var valid = false;
    for (var i = 0; i < radio.length; i++) {
        if (radio[i].checked) {
            return true;
        }
    }
    alert("Make a choice from the radio buttons.");
    return false;
}

function focusElement(formName, elemName) {
    var elem = document.forms[formName].elements[elemName];
    elem.focus();
    elem.select();
}

// batch validation router
		function validateDevForm(form) {
    	if (isNotEmpty(form.f_name)) {
        if (isNotEmpty(form.l_name)) {
					if (isNotEmpty(form.company))	{
            if (isNotEmpty(form.email)) {
              if (isEMailAddr(form.email)) {
								if (isNotEmpty(form.phone)) {
                	if (isNotEmpty(form.city)) {
										if (isChosen(form.country)) {
											if (isChosen(form.prov_state)) {
												if (isChosen(form.industry)) {
													if (isChosen(form.mmb)) {
														if (isNotEmpty(form.brief_descr)) {
															if (isChosen(form.timeframe)) {
																if (isChosen(form.have_you)) {
																	if (isNotEmpty(form.verify)) {
								                    return true;
																	}
																}
															}
														}
													}
                        }
                    	}
            	    	}
            			}
        				}
    					}
						}
					}
				}
			}
		return false;
	}
	
function validateFeedbackForm(form) 
{
  if (isNotEmpty(form.email))
	{
    if (isEMailAddr(form.email)) 
		{
			if (isChosen(form.related_to)) 
			{
				if (isChosen(form.sending_reply)) 
				{
					if (isNotEmpty(form.comments)) 
					{
						if (isNotEmpty(form.verify))
						{
							return true;
						}		
					}
				}
			}
		}
	}
	return false;
}