Resolved how to write text/integer from a function

[sophie_pocket]

Hi, I was hoping you could help me, I was wanting to write text to the screen but without re-writing the whole screen (e.g. document.write();. I wish to take text and put it in a function, modify it, then display it.
So far I have:

<script type = "text/javascript">
		function calculate(text){
				var x = "10.0";
				var gpa = text.replace(/0.0/g,x);
				document.getElementById("text").innerText=gpa;				
			}
		</script>
		<p id = text >Your Grade Point Average (GPA) is: 0.0</p>
		<button type="button" onclick="calculate(text)">Calculate</button>

Your help would be really appreciated

[DaveyErwin]

<script type = "text/javascript">
		function calculate(text){
				var text = document.getElementById(text);
				var x = "10.0";
				var gpa = text.innerHTML.replace(/0.0/g,x);
				text.innerHTML=gpa;				
			}
		</script>
		<p id = "text" >Your Grade Point Average (GPA) is: 0.0</p>
		<button type="button" onclick="calculate('text')">Calculate</button>

<script type = "text/javascript">
		function calculate(elementId){
				var el = document.getElementById(elementId);
				var x = "10.0";
				var gpa = el.innerHTML.replace(/0.0/g,x);
				el.innerHTML=gpa;				
			}
		</script>
		<p id = "textP" >Your Grade Point Average (GPA) is: 0.0</p>
		<button type="button" onclick="calculate('textP')">Calculate</button>

[sophie_pocket]

Thank you so much! it works perfectly