i want radio button functionality in checkbox and that checkbox is also toggle..?

This Is First CheckBox Code

<input type="checkbox" class="abc" id="chkbox1" value="" />
<label for="chkbox1" style="border: 1px solid #2d5f7c;width:90px;border-bottom-left-radius:4px;border-top-left-radius:4px;font-family:SertoJerusalem;">Abc</label>

This Is Second CheckBox Code

<input type="checkbox" class="def" id="chkbox2" value="" />
<label for="chkbox2" style="border: 1px solid #2d5f7c;width:90px;border-bottom-right-radius:4px;border-top-right-radius:4px;font-family:SertoJerusalem;">Def</label>

i want radio button functionality in this two checkbox and also toggle.

means i load page first time my two checkbox unchecked. then i one checkboc abc checked.now i am second checkbox def checked that time abc unchecked.and now click on again def then def checkbox unchecked.

Thanks In Advance...Please Do