function Checkfield() {
txt1=document.form.email.value;

if (document.form.territory.selectedIndex < 1)
{
alert("Please select the Territory of Interest.");
document.form.territory.focus();
return false;
}

else if(document.form.first_name.value==""){
alert("Please Enter your First Name.");
document.form.first_name.focus();
return false;
}

else if(document.form.last_name.value==""){
alert("Please Enter your Last Name.");
document.form.last_name.focus();
return false;
}

else if(document.form.city.value==""){
alert("Please Enter your City Name.");
document.form.city.focus();
return false;
}


else if(document.form.phone.value==""){
alert("Please Enter Phone No.");
document.form.phone.focus();
return false;
}


else if (txt1.indexOf("@")<2){
alert("Check your Email Address .Please"
+"check the prefix and '@' sign.");
document.form.email.focus();
return false;
}


else if ((txt1.indexOf(".")<1)){
alert("Check your Email Address.\n");
document.form.email.focus();
return false;
}


else
return true; 
}










function isValidEmail(address) {
	if (address.indexOf('@') < 3) return false;
	var name = address.substring(0, address.indexOf('@'));
	var domain = address.substring(address.indexOf('@') + 1);
	if (name.indexOf('(') != -1 || name.indexOf(')') != -1 || name.indexOf('<') != -1 || name.indexOf('>') != -1 || name.indexOf(',') != -1 || name.indexOf(';') != -1 || name.indexOf(':') != -1 || name.indexOf('\\') != -1 || name.indexOf('"') != -1 || name.indexOf('[') != -1 || name.indexOf(']') != -1 || name.indexOf(' ') != -1) return false;
	if (domain.indexOf('(') != -1 || domain.indexOf(')') != -1 || domain.indexOf('<') != -1 || domain.indexOf('>') != -1 || domain.indexOf(',') != -1 || domain.indexOf(';') != -1 || domain.indexOf(':') != -1 || domain.indexOf('\\') != -1 || domain.indexOf('"') != -1 || domain.indexOf('[') != -1 || domain.indexOf(']') != -1 || domain.indexOf(' ') != -1) return false;
	return true;
}


function isValidZipcode(zipcode) {
	zipcode = removeSpaces(zipcode);
	if (!(zipcode.length == 5) || !isNumeric(zipcode)) return false;
	return true;
}


function isAlphabetic(string, ignoreWhiteSpace) {
	if (string.search) {
		if ((ignoreWhiteSpace && string.search(/[^a-zA-Z\s]/) != -1) || (!ignoreWhiteSpace && string.search(/[^a-zA-Z]/) != -1)) return false;
	}
	return true;
}




function isNumeric(string, ignoreWhiteSpace) {
	if (string.search) {
		if ((ignoreWhiteSpace && string.search(/[^\d\s]/) != -1) || (!ignoreWhiteSpace && string.search(/\D/) != -1)) return false;
	}
	return true;
}