function setAgentChk(type) {
    //check what has been selected
    clearAllCheckBoxes();
    var sale = false;
    var let = false;
    $('.sendlistagents').each(function () {
        $('#sell').is(':checked') || $('#buy').is(':checked') ? sale = true : sale = false;
        $('#let').is(':checked') || $('#rent').is(':checked') ? let = true : let = false;
    });

    if (sale) {
        checkAllSalesAgents()
    }
    if (let) {
        checkAllLettingAgents()
    }
}

function clearAllCheckBoxes() {
    $('.sendlistagents').each(function () {
        this.checked = false;
    })
}


function checkAllSalesAgents() {
    var salesAgts = $('#sales').val().split("|");
    $('.sendlistagents').each(function () {
        for (i = 0; i <= salesAgts.length; i++) {
            if (salesAgts[i] == this.value) { this.checked = true; }
        };
    })

}

function checkAllLettingAgents() {
    var salesAgts = $('#lettings').val().split("|");
    $('.sendlistagents').each(function () {
        for (i = 0; i <= salesAgts.length; i++) {
            if (salesAgts[i] == this.value) { this.checked = true; }
        };
    })

}