Need Some Help With a Function PLZ..

**Lost_comp** · 07-16-2003 06:19 PM

Write a function that will calculate and return the amount that should be paid as a tip for a restrurant bill.

Assume 20%

Use input box 4 user input.

Im lost already.

Thanks in advanced!!

**Khalid Ali** · 07-16-2003 06:30 PM

get value from the text field

var val = (parseInt(document.formName.textfieldName.value)
//(presuming that values is always a number

//now calculate the tip
val = (val*.20).toFixed(2);
//if you want the tip added to the toal then

//val = (val+(val*.20)).toFixed(2);

//now re populate the text field
document.formName.textfieldName.value = val

//or see an alert box

alert("Tip to be paid = "+val)

**Lost_comp** · 07-16-2003 07:06 PM

coo thanks, I'll reply back if I get stuck. I think I shouldn't be though.

**Lost_comp** · 07-16-2003 07:13 PM

Still needing some help.....I think my whole thing is wrong.?

**Khalid Ali** · 07-16-2003 09:00 PM

Here you fo

<head>
<script type="text/javascript">
<!--
function Process(val){
var val = (isNaN(parseInt(val)))? 00

arseInt(val);
if(val==00){document.form1.t1.value="0"; return false;}
val = (val+(val*.20)).toFixed(2);
document.form1.total.value = val;
}

//-->
</script>
</head>
<body>
<form name="form1" action="" onsubmit="" method="post" enctype="text/plain">
Enter Amount <input type="text" name="t1" maxlength="4" onkeyup="Process(this.value);" size="4"/> * 20% = <input type="text" name="total" maxlength="4" size="4"/>
</form>

**Lost_comp** · 07-16-2003 09:04 PM

thanks

**Khalid Ali** · 07-16-2003 09:13 PM

You are welcome

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