function submitonce(form){
//if IE 4+ or NS 6+
if (document.all||document.getElementById){
//screen thru every element in the form, and hunt down "submit" 
for (i=0;i<form.length;i++){
var tempobj=form.elements[i]
if(tempobj.type.toLowerCase()=="submit")
//disable em
tempobj.disabled=true
}
}

}
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 email address");
		   return false
		}

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

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

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

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

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid email address");
		    return false;
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("You have entered an invalid email address");
		    return false;
		 }

	}
	
function validateFrm() {
if (document.digby_email.email.value == "") {
	alert("Please enter your email");
	return false;
} else if (document.digby_email.email.value != "") {
		var emailchk = document.digby_email.email.value;
		return echeck(emailchk);
}

return true;

}