function refreshIframeCFD(){
                var ifr = document.getElementsByName('someThing')[0];
                ifr.src = "experiment/cfd.html";
            }

function refreshIframeLift(){
                var ifr = document.getElementsByName('someThing')[0];
                ifr.src = "experiment/liftgen.html";
            }

function refreshIframeWOProp(){
                var ifr = document.getElementsByName('someThing')[0];
                ifr.src = "experiment/withoutprop.html";
            }

function refreshIframeWProp(){
                var ifr = document.getElementsByName('someThing')[0];
                ifr.src = "experiment/withprop.html";
            }

function refreshIframeSlip(){
                var ifr = document.getElementsByName('someThing')[0];
                ifr.src = "experiment/sideslip.html";
            }

function refreshQuizOne(){
                var ifr = document.getElementsByName('quiz')[0];
                ifr.src = "quiz/q1.html";
            }

function refreshQuizTwo(){
                var ifr = document.getElementsByName('quiz')[0];
                ifr.src = "quiz/q2.html";
            }

function refreshQuizThree(){
                var ifr = document.getElementsByName('quiz')[0];
                ifr.src = "quiz/q3.html";
            }