How to use JavaScript timer to make pop-up window advertisement
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The specific code is as follows
Title * {padding: 0; margin: 0;} li {list-style: none;} body {background: # 940032;} # counter {width: 500px; height: 420px; background: # 939; margin: 50px auto 0; position: relative;} # counter h3 {line-height: 42px; padding-left: 15px; font-size: 14px; font-family: arial; color: # ff3333;} # counter a {font-weight: normal Text-decoration: none; color: # ff3333;} # counter a:hover {text-decoration: underline;} # bg {width: 280px; height: 200px; border: 3px solid # 680023; background: # 990033; filter: alpha (opacity=80); opacity: 0.8; position: absolute; left: 50%; top: 115px; margin-left:-141px;} # counter_content {width: 250px; position: absolute; top: 130px; left 130px: Z-index: 1;} # counter_content h4 {margin-bottom: 10px;} # counter_content h4 input {border: none; width: 223px; height: 30px; line-height: 30px; padding: 010px; background: url (img/ico.png) no-repeat; text-align: right; color: # 333; font-size: 14px; font-weight: bold;} # counter_content div {width: 250px;} # counter_content input {width: 60px Height: 30px; line-height: 30px; float: left; background: url (img/ico.png) no-repeat-303px 0; text-align: center; color: # fff; cursor: pointer; margin: 0 1px 4px 0; border: 0;} # counter_content div > input:hover {background: url (img/ico.png) no-repeat-243px 0;} # counter p {width: 500px; position: absolute; bottom: 20px; left: 0; color: # ff3333 Text-align: center; font-size: 12px;} simple calculation var showInput = document.getElementById ("input1"); var isClear = false; var tempStr = ""; var clacType = ""; var isContinue = true; function kick (clickValue) {switch (clickValue) {case "=": if (tempStr! = "& clacType! =") {showInput.value = clac (tempStr, showInput.value, clacType); isContinue = false; clacType = "" } break; case "+": case "-": case "*": case "/": / / if the stored operator is not empty, it means continuous operation if (clacType! = "" &! isContinue) {/ / execute the calculation tempStr = clac (tempStr, showInput.value, clacType) first; isClear = true; clacType = clickValue;} else {tempStr = showInput.value; / / the stored character isClear = true after clicking the operator / / indicates that the operator clacType = clickValue;// stored operator} isContinue = true; break; case "C": showInput.value = "0"; isClear = false; tempStr = ""; clacType = ""; break; default:// ordinary numeric button click showInput.value = showInput.value = = "0"? ": showInput.value; isContinue = false; if (isClear) {showInput.value ="; showInput.value + = clickValue IsClear = false;} else {showInput.value + = clickValue;} break;} function clac (num1, num2, type) {switch (type) {case "+": return Number (num1) + Number (num2); case "-": return Number (num1)-Number (num2); case "*": return Number (num1) * Number (num2); case "/": return Number (num1) / Number (num2); default: break;}}
Effect picture:
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