// JavaScript Document
// functions used on the Contact page



function validate_form ( )
{
    valid = true;
	var form = document.form;
	var emailID=form.email
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please enter your email address")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	
	if ( form.subject.value == "" )
	{
		alert ( "Please enter a subject for your message." );
		form.title.value=""
		form.title.focus()
		return false		
	}
	
	if ( form.comments.value == "" )
	{
		alert ( "Please enter something in the message field, and be nice." );
		form.title.value=""
		form.title.focus()
		return false		
	}
	
	return valid;
}


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("Invalid E-mail address")
	   return false
	}

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

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

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

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

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

	 return true;				
}