Question

172

check if a checkbox is checked without using jquery?

rated 0 times [ 173] [ 1] / answers: 1 / hits: 31056 / 10 Years ago, wed, november 26, 2014, 12:00:00

I have form on page1.php:

<form method=POST action=page2.php>

<input type=checkbox name=F10 id=f10>

<input type=checkbox name=W10 id=w10>

<input type=checkbox name=F20 id=f20>

<input type=checkbox name=W20 id=w20>

<input type=checkbox name=F30 id=f30>

<input type=checkbox name=W30 id=w30>

</form>

I want to diable a checkbox if another checkbox is checked using javascript or XMLHttpRequest().
I tried doing it using javascript but it didn't work.

if(document.getElementById(f10).checked){

   document.getElementById(w20).disabled=true;

}

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lelasamiraa

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3 Years ago

answered 10 Years ago estefanib · Accepted Answer

You can use regular javascript to get a true or false value for checked for example,

var isChecked= document.getElementById('elementName').checked;

if(isChecked){ //checked

  //execute code here

}else{ //unchecked

  //execute code here

}

or if you want whenever the checkbox check is changed

var checkbox = document.getElementById('elementName');

checkbox.addEventListener(change, functionname, false);



function functionname(){

  var isChecked = checkbox.checked;

  if(isChecked){ //checked



  }else{ //unchecked



  }

}