Passing 2 Parameter In 2 Different Checkbox Into A Function

<input type ="checkbox" id = "checkbox1" checked ="checked" value="1" onclick = "a()"/>
<input type ="checkbox" id = "checkbox1" checked ="check开发者_如何学运维ed" value="2" onclick = "a()"/>

function(checkbox1,checkbox2)
{ 
   if(checkbox1.checked == true && checkbox2.checked == false)
   {
     alert("checkbox1 is checked, Checkbox2 ix Unchecked");
   }
}

how can i pass the checkbox1 and checkbox2 value in a()???

You can just grab it using :

var mycheckbox1 = document.getElementById('checkbox1');

and

var mycheckbox2 = document.getElementById('checkbox2');

You might want to change your checkbox2's id to id='checkbox2' having non-unique id is not valid syntax.

If you were asking to modify the function you posted then it's the following:

<input type ="checkbox" id = "checkbox1" checked ="checked" value="1" onclick = "a()"/>
<input type ="checkbox" id = "checkbox2" checked ="checked" value="2" onclick = "a()"/>

function a(){
     var mycheckbox1 = document.getElementById('checkbox1');
     var mycheckbox2 = document.getElementById('checkbox2');
     if(mycheckbox1.checked && !checkbox2.checked)
          alert('checkbox1 is checked, checkbox2 is unchecked');
}

Now if you were asking to get the value of the checkbox that is checked then it's the following:

<input type ="checkbox" id = "checkbox1" checked ="checked" value="1" onclick = "a(this)"/>
<input type ="checkbox" id = "checkbox2" checked ="checked" value="2" onclick = "a(this)"/>

function a(box){
    if(box.checked)
      alert(box.value);
}

I suppose you could do it this way... If you really wanted to

onclick="a(document.getElementById('checkbox1'), document.getElementById('checkbox2'))"

Here is a solution that gets all checkboxes in the form and displays their value and state

<form id="myForm">
<input type ="checkbox" id = "checkbox1" checked ="checked" value="1" onclick = "a()"/>
<input type ="checkbox" id = "checkbox2" checked ="checked" value="2" onclick = "a()"/>
</form>
<script>
function a(){
    form = document.getElementById("myForm")
    str = ""
for (i=0;i<form.elements.length;i++) {
    type = form.elements[i].type
     if (type=="checkbox") {
            str += "\n"
        str += (form.elements[i].checked)? form.elements[i].id + " is checked " : form.elements[i].id + " is unchecked ";
        str += "\n"
        str +=  form.elements[i].id + " value is  "+ form.elements[i].value;
     }


}
    alert(str);
}
</script>

If you want just individual values /state see below For value

 <input type ="checkbox" id = "checkbox1" checked ="checked" value="1" onclick = "a(this.value)"/>
    <input type ="checkbox" id = "checkbox1" checked ="checked" value="2" onclick = "a(this.value)"/>
    <script>
    function a(v){
        alert(v)
    }
    </script>

For checked/unchecked state

<input type ="checkbox" id = "checkbox1" checked ="checked" value="1" onclick = "a(this.checked)"/>
<input type ="checkbox" id = "checkbox1" checked ="checked" value="2" onclick = "a(this.checked)"/>
<script>
function a(v){
    alert(v)
}
</script>