IF's and Loops

[jonniethecodeprince]

Hi guys,

I've been doing a lot of study recently into JavaScript programming. I can write small simple scripts with one fundamental in them e.g. one with an IF statement one with an IF Else... one with a FOR loop etc but I cannot mix them.

For example :

<script language = "javascript" type = "text/javascript">
 
var inputName
 
do
{
inputName = prompt("Enter your name","")
}
 
while (isNaN(inputName) == false);
 
if (isNaN(inputName == false))
{
    document.write("Need name not a number")
}
document.write("Hello " + inputName);
 
</script>

This script is trying to run a while loop that is dependent on an IF statement. I want to force the user to enter a string rather than a number using the prompt function.

What am I missing please? Thanks

[mrhoo]

var inputName='', str="Enter your name";
while (!inputName){
    inputName= prompt(str,"");
    if(!/\S/.test(inputName) || /[^a-z ' \.]/i.test(inputName)){
        var str= 'Need a name ';
        if(/\S/.test(inputName)){
            str+= /\d/.test(inputName)? ', not a number': ', not '+inputName;    
        }    
        inputName='';
    }
}
alert("Hello " + inputName);