سامانه دریافت تخفیف

//<![CDATA[ $("select").change(function () { // hide all optional elements $('.optional').css('display','none'); $("select option:selected").each(function () { if($(this).val() == "circle") { $('.circle').css('display','block'); } else if($(this).val() == "square") { $('.square').css('display','block'); } else if($(this).val() == "triangle") { $('.triangle').css('display','block'); } else if($(this).val() == "rectangle") { $('.rectangle').css('display','block'); } else if($(this).val() == "rhombus") { $('.rhombus').css('display','block'); } else if($(this).val() == "trapezoid") { $('.trapezoid').css('display','block'); } else if($(this).val() == "cone") { $('.cone').css('display','block'); } else if($(this).val() == "sphere") { $('.sphere').css('display','block'); } }); }); const button = document.getElementById("calculate"); let area = 0; let volume = 0; let perimeter = 0; var ashape = "هندسی"; var vshape = "هندسی"; var pshape = "هندسی"; function calculatePerimeter() { // get the selected shape let perimeters = document.getElementById("id_perimeters").value; // calculate the shape's perimeter switch (perimeters) { case "circle": var pshape = "دایره"; let radius = document.getElementById("id_radius").value; perimeter = Math.PI * radius * 2; break; case "square": var pshape = "مربع"; let side = document.getElementById("id_side").value; perimeter = side * 4; break; case "triangle": var pshape = "مثلث"; let side1 = document.getElementById("id_side1").value; let side2 = document.getElementById("id_side2").value; let side3 = document.getElementById("id_side3").value; perimeter = Number(side1) + Number(side2) + Number(side3); break; case "rectangle": var pshape = "مستطیل"; let length = document.getElementById("id_length").value; let width = document.getElementById("id_width").value; perimeter = 2 * (Number(length) + Number(width)); break; case "rhombus": var pshape = "لوزی"; let rside = document.getElementById("id_rside").value; perimeter = rside * 4; break; case "trapezoid": var pshape = "ذوزنقه"; let tside1 = document.getElementById("id_tside1").value; let tside2 = document.getElementById("id_tside2").value; let tside3 = document.getElementById("id_tside3").value; let tside4 = document.getElementById("id_tside4").value; //var sum= Number(lside) + Number(sside); perimeter = Number(tside1) + Number(tside2) + Number(tside3) + Number(tside4); break; case "cone": var pshape = "مخروط"; let cpradius = document.getElementById("id_cpradius").value; let cpsheight = document.getElementById("id_cpsheight").value; perimeter = Math.PI * cpradius * (Number(cpsheight) + Number(cpradius)); break; case "sphere": var pshape = "کره"; let spradius = document.getElementById("id_spradius").value; perimeter = Math.PI * spradius * 2; break; } perimeter1 = Math.round((perimeter + Number.EPSILON) * 100) / 100; document.getElementById("id_output").innerHTML = "محیط " + pshape + " = " + perimeter1 + " سانتیمتر "; } button.addEventListener("click", calculatePerimeter); //]]>