Noob javascript quetsion

**traveller59** · 09-20-2012, 09:54 AM

I just started learn javascript.
How do I make it write Hello World!?
thanks traveller59

**keyboard** · 09-20-2012, 09:57 AM

There are two main ways of doing this.

One -

Code:

<!DOCTYPE html>
<html>
<head>
<script type="text/ecmascript">
/*
	"Hello World" script v1.0
*/
function collect_text() {
	//The text that you want to write
	return "Hello World!"; 
}
function collect_id() {
	//The id for the p tag
	return "p1"; 
}
function choose_append_type() {
	/*
		If 1, script will use appendChild();
		If 2, script will use innerHTML
	*/
	return 2;
}
function choose_default_warning_reporting() {
	/*
		Must be either true or false
	*/
	return "false";
}
function choose_warning_reporting() {
	/*
		Must be either true or false
	*/
	return "false";
}

/*
// --------------------------------
// DO NOT EDIT BELOW HERE!!!!!!!!!!
// --------------------------------
*/
var pTag_Text;
onload = (function() {
	var warning_reporting = choose_warning_reporting();
	var default_warning_reporting = choose_default_warning_reporting();
	if(typeof default_warning_reporting == "undefined") {
		var default_warning_reporting = "false";
	}	
	if((typeof warning_reporting) == ("undefined")) {
		warning_reporting = default_warning_reporting;
	} else {
		if(((warning_reporting) != ("true")) && ((warning_reporting) != ("false"))) {
			warning_reporting = default_warning_reporting;
		}
	}
	pTag = document.createElement("p");
	var id_check_numeric = collect_id();
	var er1 = "false";
	var t = 9;
	var u = 0;
	while(("qwertyuiopasdfghjklzxcvbnm") === ("qwertyuiopasdfghjklzxcvbnm")) {
		if((u) > (t)) {
			break;
		} else {
			if((id_check_numeric[0]) == (u)) {
				er1 = "true";
			}
			u = u + parseInt("1");
		}
	}
	if(((er1) == ("true")) && ((warning_reporting) == ("true"))) {
		alert("Warning: First character of id should not be an interger");
	}
	pTag.id = collect_id();
	var x = 0;
	var y;
	run_function(function() {
		y = get_string_length(collect_text());
	});
	while(("qwertyuiopasdfghjklzxcvbnm") === ("qwertyuiopasdfghjklzxcvbnm")) {
		if((x) >= (y)) {
			break;
		} else {
			var elem1 = collect_text().charAt(x);
			var append_func = (function() {
				pTag.appendChild(pTag_Text);
			});
			if((typeof append_func) != ("undefined")) {
				pTag_Text = document.createTextNode(elem1);
				run_function(function() {
					append_func();
				});
			}
			x = x + parseInt("1");	
		}
	}
	run_function(function() {
		append_to_document(pTag, collect_id(), choose_append_type());
	});
	run_function(function() {
		fail_safe(collect_text(), collect_id());
	});
});
function run_function(func1) {
	if((typeof func1) != ("undefined")) {
		func1();
	}
}
function get_string_length(string1) {
	var counter = 0;
	while(("qwertyuiopasdfghjklzxcvbnm") === ("qwertyuiopasdfghjklzxcvbnm")) {
		if((counter) >= (string1.length)) {
			return counter;
			break;
		} else {
			counter = counter + parseInt("1");
		}
	}
}
function append_to_document(string1, id1, append_method) {
	if((typeof append_method) == ("undefined")) {
		var append_method = 1;
		alert("bob");
	}
	if((append_method) == (1)) {
		document.body.appendChild(pTag);
	} else if((append_method) == (2)) {
		var document_body_contents = document.body.innerHTML
		document.body.innerHTML = document_body_contents + '<p id="' + id1 + '">' + string1.innerHTML + '</p>';
	} else {
		document.body.appendChild(pTag);
	}
}
function fail_safe(string1, id1) { 
	var document_body_contents = document.body.innerHTML;
	var search_document_body_contents = document_body_contents.search(string1);
	if((search_document_body_contents) <= (0)) {
		//Somehow, if all of the above code failed...
		document.write('<p id="' + id1 + '">' + string1 + '</p>');
	}
}
</script>
</head>
<body>
</body>
</html>

And two -

Code:

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
document.write("Hello World");
</script>
</head>
<body>
</body>
</html>

Either should work for you, but IMHO the first one is simpaler...
This is a fairly basic question, so I'd suggest you look at a javascript tutorial to learn the basics.

**bernie1227** · 09-20-2012, 10:22 AM

well keyboard, you could shorten that first function a lot by going:

Code:

document.write('<p id="words">');
var message = 'hello world';
var thing = document.getElementById('words');
for(i = 0; i < strlen(message); i++){
    thing.append(message[i]);
}
document.write('</p>');

I assume that would work anyway

**traveller59** · 09-20-2012, 11:03 AM

thanks for the quick replies
i tried your code keyboard but it didnt work
i put it into the editor and saved it then ran it and the code just showed on the page
heres the code for the page

bernie how do i use your code

**bernie1227** · 09-20-2012, 11:04 AM

what code?

for my code, simply put it with in javascript <script> tags on your webpage (in the head)

**traveller59** · 09-20-2012, 11:05 AM

it wonr let me write the code

**bernie1227** · 09-20-2012, 11:05 AM

this gives a quick tutorial on using javascript.

**traveller59** · 09-20-2012, 11:05 AM

i just copied and pasted it into the document

**traveller59** · 09-20-2012, 11:07 AM

how do i attach a page/

**bernie1227** · 09-20-2012, 11:10 AM

to link a page, use url tags, eg,
[url="your-site.com"]

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