//function to check if the field is blank

function check_if_blank (strng,errval) {
	var blankerr = "";
	if (strng == "" || strng == errval) {
		blankerr = "Please enter your "+errval+".\n";
	}
	return blankerr;
}

//function to check if the field have only alpha character
function check_if_alpha (strng,errval) {
	var alphaerr = "";
	var alphafilter=/^[a-zA-Z]+$/;
	if (!(alphafilter.test(strng))) {
		if(strng && strng!=errval)
		{
			alphaerr = "Please enter a valid "+errval+".\n";
		}
	}
	return alphaerr;
}

//function to check if the field have only alpha character
function check_city_name (strng,errval) {
	var alphaerr = "";
	var alphafilter=/^[a-zA-Z\(\)\-\ ]+$/;
	if (!(alphafilter.test(strng))) {
		if(strng && strng!=errval)
		{
			alphaerr = "Please enter a valid "+errval+".\n";
		}
	}
	return alphaerr;
}

//function to check if the field have only number character
function check_if_number (strng,errval) {
	var numbererr = "";
	var numberfilter=/^[0-9]+$/;
	if (!(numberfilter.test(strng))) {
		if(strng && strng!=errval) {
			numbererr = "Please enter a valid "+errval+".\n";
		}
	}
	return numbererr;
}

//function to check email id
function check_email(strng){
	var emailerr = "";
	var emailfilter=/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!(emailfilter.test(strng))) { 
		emailerr = "Please enter a valid Email Address.\n";
	}
	var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/
	if (strng.match(illegalChars)) {
	   emailerr = "Please enter a valid Email Address.\n";
	}
	return emailerr;
}

//function to check radio button
function check_radio(checkvalue,errval) {
	var radioerr = "";
	  if (!(checkvalue)) {
		   radioerr = "Please select your "+errval+".\n";
		}
	return radioerr;
}

//function to check box button
function check_box(checkvalue) {
	var checkboxerr = "";
	  if (checkvalue!=true) {
		   checkboxerr = "Please accept our Terms of Use and Privacy Policy.\n";
		}
	return checkboxerr;
}

//function to check dropdown value
function check_dropdown(choice,selval,errval) {
    var dropdownerr = "";
    if (choice == selval) {
       dropdownerr = "Please select your "+errval+".\n";
    }    
	return dropdownerr;
}