Replace all occurrences of a string in HTML page with jquery

<!DOCTYPE html>
<html>

<head>
<title>
    Replace all occurrences of a string in HTML page with jquery
</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0-alpha1/jquery.js" type="text/javascript"></script>

    <script>
        $(function() {
		
		// replace function replace "xyz.com" to "www.ourNewSite.com" without regular expression
            $('#btnReplaceWithOutRegularExpression').click(function() {
                var obj0 = $('#Sitecontent');
                var pos = 0;
                var replaceTo = "oldsite.com"
                var replaceWith = "www.ournewsite.com";
                while (pos !== -1) {
                    pos = obj0.html().indexOf(replaceTo, pos); //indexOf return the index position of text
                    if (pos != -1) // loop run till string exists in document
                    {
                        obj0.html(obj0.html().replace(replaceTo, replaceWith)) 
                        pos = pos + replaceWith.length;
                    }
                }
            });
			
			// replace function replace "xyz.com" to "www.ourNewSite.com" with the help of regular expression
			$('#btnReplaceWithRegularExpression').click(function() {
                var obj0 = $('#Sitecontent1');
                
                var replaceTo = /oldsite.com/g
                var replaceWith = "www.ournewsite.com";
				
				
                        obj0.html(obj0.html().replace(replaceTo, replaceWith))        
            });
        });
    </script>
</head>

<body>
 <button  id="btnReplaceWithOutRegularExpression">Replace oldsite.com to www.ournewsite.com without regular expression</button><br><br>
 <button  id="btnReplaceWithRegularExpression">Replace oldsite.com to www.ournewsite.com with regular expression</button>
 <br> <br>
<div id="Sitecontent">
		<P dir="ltr" style="text-align: left;" trbidi="on">
		    Welcome to oldsite.com.
		</P>
		<P dir="ltr" style="text-align: left;" trbidi="on">
		    In oldsite.com  we work on latest technologies.
		</P>
		<P dir="ltr" style="text-align: left;" trbidi="on">
		 Our Office
		    oldsite.com
		    xxx xx
		</P>
		<P dir="ltr" style="text-align: left;" trbidi="on">
		 Thanks
		 oldsite.com
		</P>
</div>

<br>

<div id="Sitecontent1">
		<P dir="ltr" style="text-align: left;" trbidi="on">
		    Welcome to oldsite.com.
		</P>
		<P dir="ltr" style="text-align: left;" trbidi="on">
		    In oldsite.com  we work on latest technologies.
		</P>
		<P dir="ltr" style="text-align: left;" trbidi="on">
		 Our Office
		    oldsite.com
		    xxx xx
		</P>
		<P dir="ltr" style="text-align: left;" trbidi="on">
		 Thanks
		 oldsite.com
		</P>
</div>
</body>
</html>

// Code goes here

/* Styles go here */