Check /uncheck all check boxes in MVC view

<input type="checkbox" name="Test1" onclick="SetAllCheckBoxes(this)"/>
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
</br>
<input type="checkbox" name="Test2" onclick="CheckBox(this)"/>
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />

function SetAllCheckBoxes(obj) {
        var c = new Array();
        c = document.getElementsByTagName('input');
        for (var i = 0; i < c.length; i++) {
            if (c[i].type == 'checkbox') {
                c[i].checked = obj.checked;
            }
        }
    }


function CheckBox(obja) {
        var d = new Array();
        d = document.getElementsByTagName('input');
        for (var i = 0; i < d.length; i++) {
            if (d[i].type == 'checkbox') {
                d[i].checked = obja.checked;
            }
        }
    }