//function to validate by length
function lengthValid(field, len, text) {
    // text = Trim(text);
	if (field.value.length < len)
  	{
 	  	alert("Please enter a valid " + text + ".");
		field.focus();
		return false;
	}else{
		return true;
	}
}

//function to validate numerical fields
function numberValid(field, text) {
    //text = Trim(text);
	if (isNaN(field.value))
  	{
 	  	alert("Please enter a valid " + text + ".");
		field.focus();
		return false;
	}else{
		return true;
	}
}


//function to validate Zip Code fields
function zipValid(field,len, text) {
    //text = Trim(text);
	if (isNaN(field.value) || field.value.length < len)
  	{
 	  	alert("Please enter a valid " + text + ".");
		field.focus();
		return false;
	}else{
		return true;
	}
}

//function to validate email
function emailValid(mailfield, len, text) {
   // text = Trim(text);
	if(mailfield.value.length < len || mailfield.value.indexOf("@") < 1 || mailfield.value.indexOf(".") < 2)
	{
	    alert("Please enter a valid " + text + ".");
		mailfield.focus();
		return false;
	}else{
		return true;
	}
}

//function to validate select drop-downs
function selectValid(field, text) {
    //text = Trim(text);
	if (field[0].selected)
  	{
 	  	alert("Please select a " + text + ".");
		field.focus();
		return false;
	}else{
		return true;
	}
}