Javascript/parseInt()

解説文字列を整数に変換

parseInt(string, 進数)初期値は10

sample1

s1p

sample1code

function s1Func(){
  var s1Str = "-1.5";
  var s1Str02 = "aaa";
  document.getElementById("s1p").innerHTML = parseInt(s1Str, 10) + "," + parseInt(s1Str02, 10);
}

sample2

sample2code

function s2Func(){
  //テキストボックスの数値を変数に格納する
  var num1 = parseInt(document.s2Form.elements[0].value, 10);
  var num2 = parseInt(document.s2Form.elements[1].value, 10);
  alert(num1 + num2);
}

sample3

s3p

sample3code

var s3p = document.getElementById("s3p");
s3p.style.position = "relative";
s3p.style.left = "0px";
function s3Func(){
   s3p.style.left = parseInt(s3p.style.left) + 10 + "px";
}