JavaScript dysplay:none display:block id class
function idChange(temp) { page0.style.display = "none"; page1.style.display = "none"; page2.style.display = "none"; page3.style.display = "none"; page4.style.display = "none"; page5.style.display = "none"; page6.style.display = "none"; if(temp == 0) page0.style.display = "block"; if(temp == 1) page1.style.display = "block"; if(temp == 2) page2.style.display = "block"; if(temp == 3) page3.style.display = "block"; if(temp == 4) page4.style.display = "block"; if(temp == 5) page5.style.display = "block"; if(temp == 6) page6.style.display = "block"; } function classChange(temp) { var page0 = document.querySelector(".page0"); var page1 = document.querySelector(".page1"); var page2 = document.querySelector(".page2"); var page3 = document.querySelector(".pag...