javascript - Display text based on drop down selection (code works on jsfiddle but not website?) -

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i having issues code somewhere can't figure out. here jsfiddle link

document.getelementbyid('email-list').onchange = function() {     var = 1;     var mydiv = document.getelementbyid(i);     while(mydiv) {         mydiv.style.display = 'none';         mydiv = document.getelementbyid(++i);     }     document.getelementbyid(this.value).style.display = 'block'; };

works fine on there can work on either of 2 different websites local on wamp or live. missing something?

your js fiddle example works because have selected onload option in jsfiddle. make sure have wrapped code window.onload

window.onload = function(){ document.getelementbyid('email-list').onchange = function() {     var = 1;     var mydiv = document.getelementbyid(i);     while(mydiv) {         mydiv.style.display = 'none';         mydiv = document.getelementbyid(++i);     }     document.getelementbyid(this.value).style.display = 'block'; }};

js fiddle example


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