php - How can hide my combobox with JAvascript? -

i have combobox id name option , id name "chk" , checkbox name "chk"

and script ;i put script onclick not work ;i check script loading ;i not understand why not work ?can me?

function checkall() {     //do stuff need here  document.getelementbyid('option').style="none"; }  <input type=\"checkbox\" name=\"chk\" value=\"chk\" onclick=\"checkall()\"> 

you need use display property:

document.getelementbyid('option').style.display = "none"; 

this should work if have assigned element id="option"

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if want check checkbox (as function name suggests), need use checked property instead:

document.getelementbyid('option').checked = true;