How to compare symbols in javascript -

how compare symbols in javascript? have left arrow in program , not working:

<input type="button" id="backspace" value="&#8592" /> document.getelementbyid("backspace").onclick=function (){display_ctrl(this.value);}; function display_ctrl(parameter){       if (parameter=="&#8592"){alert("this left arrow");} 

how can compare whether particular symbol?

try using unicode instead - "\u2190" left arrow.

> "&#8592" "&#8592" > "\u2190" "←" 

your code become (i have formatted more readable):

document.getelementbyid("backspace").onclick = function() {     display_ctrl(this.value); } function display_ctrl(parameter) {     if (parameter == "\u2190") {         alert("this left arrow");     } }