//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) {

var email = mailfield;
var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
if (!filter.test(email.value)) {
alert('Please provide a valid email address');
return false;
email.focus
}
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;
	}
}


 function date_validate(DD, MM, YY) {

var return_value = true;
	
	if( MM == "" || YY == "" || DD == ""){
    alert('Please Select a Date');
    return_value = false;
}

    var InputDate = new Date();
    var CurrentDate = new Date();



    InputDate.setDate(DD);
    InputDate.setMonth(fixDate(MM));
    InputDate.setFullYear(YY);


    if(InputDate < CurrentDate){
        alert('date entered has already passed');
        return_value = false;        
    }
    else{
    var SixMonthsAheadDateTime = new Date();
    SixMonthsAheadDateTime.setDate(SixMonthsAheadDateTime.getDate()+180);

    if(SixMonthsAheadDateTime < InputDate){
        alert('we only accept dates that are within 6 months');
        return_value = false;
    }
    }


return return_value;
    
}


function fixDate(MM){
if(MM == "January"){MM = 0;}
if(MM == "February"){MM = 1;}
if(MM == "March"){MM = 2;}
if(MM == "April"){MM = 3;}
if(MM == "May"){MM = 4;}
if(MM == "June"){MM = 5;}
if(MM == "July"){MM = 6;}
if(MM == "August"){MM = 7;}
if(MM == "September"){MM = 8;}
if(MM == "October"){MM = 9;}
if(MM == "November"){MM = 10;}
if(MM == "December"){MM = 11;}

return MM;
}