//function to check if the field is blank

function check_if_blank (strng,errval) {
	var blankerr = "";
	if (strng.value == "" || strng.value == errval) {
		blankerr = "Please enter your "+errval+".\n";
		focusElement(strng.name);
		strng.style.borderColor = "#ff0000";
	}
	else {
		strng.style.borderColor = "#8bd0f7";		
	}
	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.value))) {
		if(strng.value && strng.value!=errval) {
			alphaerr = "Please enter a valid "+errval+".\n";
			focusElement(strng.name);	
			strng.style.borderColor = "#ff0000";
		}
	}
	else {
		strng.style.borderColor = "#8bd0f7";		
	}
	return alphaerr;
}

//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})+$/;
	var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/	
	if (!(emailfilter.test(strng.value))) { 
		emailerr = "Please enter a valid Email Address.\n";
		focusElement(strng.name);
		strng.style.borderColor = "#ff0000";		
	}
	else if (strng.value.match(illegalChars)) {
	   emailerr = "Please enter a valid Email Address.\n";
		focusElement(strng.name);	   
		strng.style.borderColor = "#ff0000";
	}
	else {
		strng.style.borderColor = "#8bd0f7";		
	}
	return emailerr;
}