/*或者不用jquery*/
/*商品数量框输入*/
function keyup(){
var quantity = document.getElementById("quantity").value;
if(isNaN(quantity) || parseInt(quantity)!=quantity || parseInt(quantity)<1){
quantity = 1;
return;
}
if(quantity>=10){
document.getElementById("quantity").value=quantity.substring(0,quantity.length-1);
alert("商品数量不能大于10");
}
}
/*商品数量+1*/
function numAdd(){
var quantity = document.getElementById("quantity").value;
var num_add = parseInt(quantity)+1;
var price=document.getElementById("price").value;
if(quantity==""){
num_add = 1;
}
if(num_add>=10){
document.getElementById("quantity").value=num_add-1;
alert("商品数量不能大于10");
}else{
document.getElementById("quantity").value=num_add;
var Num=price*num_add;
document.getElementById("totalPrice").innerHTML=Num.toFixed(2);
}
}
/*商品数量-1*/
function numDec(){
var quantity = document.getElementById("quantity").value;
var price=document.getElementById("price").value;
var num_dec = parseInt(quantity)-1;
if(num_dec>0){
document.getElementById("quantity").value=num_dec;
var Num=price*num_dec;
document.getElementById("totalPrice").innerHTML=Num.toFixed(2);
}
}
function show()
{
document.getElementById("totalPrice").innerHTML=3.25*3;
}
Quantity: - +
Total Price: 28.10