[jQuery] JQ mouseover keeps firing AJAX GET -- how to make it fire once?

I put my mouse over the element and my JQ .mouseover keeps firing
loading my AJAX script over and over again like a crack addict on
LSD. How do you make it fire once?

$("#swapImage").mouseover(function(){
// get input string from the input field
var inputString = $('#swapImageValue').val();
//alert( $('#swapImageValue').val() );
// post data to our php processing page
$.ajax({
type: "GET",
url: "ajax_loadankleligaments.php",
data: "mysearchString="+inputString,
success: function(data){
if(data.length >0) {
$('#swapImage').html(data);
}
}
});
});

any help?