<body>
<input type="text" id="txt1">
<input type="text" id="txt2">
<input type="text" id="txt3">
<input type="button" id="but" value="开始排序">
<input type="text" id="txt4" disabled>
</body>
<script>
var txt1 = document.getElementById("txt1")
var txt2 = document.getElementById("txt2");
var txt3 = document.getElementById("txt3");
var txt4 = document.getElementById("txt4");
var but = document.getElementById("but");
but.onclick = function(){
var a = parseFloat(txt1.value);
var b = parseFloat(txt2.value);
var c = parseFloat(txt3.value);
txt4.value=shuzi(a,b,c);
}
function shuzi(a,b,c){
var i = 0;
if (a > b){ //比较谁大谁大就把值赋给I
i = a;
a = b;
b = i;
}
if (a > c){//比较谁大谁大就把值赋给I
i = a;
a = c;
c = i;
}
if (b > c){//比较谁大谁大就把值赋给I
mgs = b;
b = c;
c = i;
}
return ( a + "," + b + "," + c);
}
</script>
