JS gets radio selected value example code-PHP Tutorial-php.cn

Use js to get the selected value of the radio, which is often used on the submission page. At the same time, it also introduces how to get the value of the radio without selecting it.

Example,

<script> </li> <li>var chk = 0; </li> <li>window.onload=function (){ </li> <li>var chkObjs = document.getElementsByName("radio"); </li> <li>for(var i=0;i<chkObjs .length;i++){ <li>if(chkObjs[i].checked){ <li>chk = i; <li>break; <li>} <li>} <li>} <li>function check_radio(){ <li>var chkObjs = document.getElementsByName("radio"); <li>for(var i=0;i<chkObjs.length;i++){ <li>if(chkObjs[i].checked){ <li>if(chk == i){ <li>alert("The radio value has not changed and cannot be submitted"); <li>break; <li>} <li>} <li>} <li>} <li></script>
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Get the value of radio without making a choice
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