function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Oops! Invalid E-mail Address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Oops! Invalid E-mail Address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Oops! Invalid E-mail Address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Oops! Invalid E-mail Address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Oops! Invalid E-mail Address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Oops! Invalid E-mail Address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Oops! Invalid E-mail Address")
		    return false
		 }

 		 return true					
	}

function ValidateEmail(field){
	if ((field.value==null)||(field.value=="")){
		alert("Oops! Your Email Address is required.");
		field.focus();
		return false;
	}
	if (echeck(field.value)==false){
		field.value="";
		field.focus();
		return false;
	}
	return true;
}

function ValidateContactForm(form){
	var name = form.name;
	var subject = form.subject;
	var email = form.email;
	var comments = form.comments;
	if ((name.value==null)||(name.value=="")){
		alert("Oops! Your Name is required.");
		name.focus();
		return false;
	}
	if ((subject.value==null)||(subject.value=="")){
		alert("Oops! Your subject is required.");
		subject.focus();
		return false;
	}
	if ((email.value==null)||(email.value=="")){
		alert("Oops! Your Email is required.");
		email.focus();
		return false;
	}
	if ((comments.value==null)||(comments.value=="")){
		alert("Oops! Your comments are required.");
		comments.focus();
		return false;
	}
	if (echeck(email.value)==false){
		email.value="";
		email.focus();
		return false;
	}
	return true;
 }