Email Form Validation

Aug 3, 2006

I have a form which mostly works and validates with javascript Name, details, email, etc.
However the email bit is happy to validate with just @. instead of a@b.net/com/whatever.
It's probably a really simple fix, but I'm still new to javascript.. Hopefully someone can point out what I need to add / change in the following section of script.

if(form.email.value=="")
{
alert("Please Enter Email Address");
return false;
}
if(form.email.value!="")
{
str=form.email.value;
var AtTheRate= str.indexOf("@");
var DotSap= str.lastIndexOf(".");
if (AtTheRate==-1 || DotSap ==-1)
{
alert("Enter Proper Email Address");
return false;
}
else
{
if( AtTheRate > DotSap )
{
alert("Enter Valid Email Address");
return false;
} } }

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[Code]....

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User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; GTB6.3; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)
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