jQuery starts-with and ends-with

gistfile1.js

$.extend($.expr[":"], {
    "starts-with": function(elem, i, data, set) {
        var text = $.trim($(elem).text()),
        term = data[3];
        return text.indexOf(term) === 0;
    },
    "ends-with": function(elem, i, data, set) {
        var text = $.trim($(elem).text()),
        term = data[3];        
        return text.lastIndexOf(term) === text.length - term.length;
    }
});

//Example
$("div:starts-with('inserttext')");