help with if else statement

I am trying to get this to work but im having problems, can anyone help me please, I have it writing the answer to mychoice, but i cant get it to go to a url if the answer is "english13i34gb128gbblack" , this is what I have on the frame action at the end of the timeline:

var _this = this;

_this.stop();

mychoice = language + size + cpu + ram + ssd + colour

document.write("Your choices are: " + mychoice);

if(mychoice = "english13i34gb128gbblack") {
window.open('https://www.success.com/', '_blank');
} else {
window.open('http://nomatches.com/', '_blank');
}