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("Please enter a valid e-mail address.")
	   return false
	}
	
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Please enter a valid e-mail address.")
	   return false
	}
	
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	    alert("Please enter a valid e-mail address.")
	    return false
	}
	
	 if (str.indexOf(at,(lat+1))!=-1){
	    alert("Please enter a valid e-mail address.")
	    return false
	 }
	
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	    alert("Please enter a valid e-mail address.")
	    return false
	 }
	
	 if (str.indexOf(dot,(lat+2))==-1){
	    alert("Please enter a valid e-mail address.")
	    return false
	 }
	
	 if (str.indexOf(" ")!=-1){
	    alert("Please enter a valid e-mail address.")
	    return false
	 }
	
	return true					
}

function ValidateForm(){
	var email=contact_form.email
	if (contact_form.name.value == "" || 
		contact_form.email.value == "" ||
		contact_form.phone.value == "" ||
		contact_form.phone2.value == "" ||
		contact_form.phone3.value == "" ||
        contact_form.comments.value == "") {
		alert("Please fill in all required fields")
		return false
	}
	if (echeck(contact_form.email.value)==false){
		contact_form.email.focus()
		return false
	}
	return true
}