Using JQuery to strip the html tags

ect..

Here is my code below, I need to find out how to remove these tags and keep the formatting.

function GetParam(name)
 	{
		name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
		var regexS = "[\\?&]"+name+"=([^]*)";
		var regex = new RegExp( regexS );
		var results = regex.exec( unescape(window.location.href) );
		if( results == null )
		return "";
		else
		return results[1];
 	}

	
$(document).ready(function() {
	
	//SP2010AddNewify("Customer","/International/Lists/mE%20Clients/NewForm.aspx", "mE Clients");
	ExecuteOrDelayUntilScriptLoaded(GetBlogBody, "sp.js");	
		
});

//////////////////////////////////////////////////////////////////////////
/////////////////////////////////GET ITEM////////////////////////////////


function GetBlogBody() {

  
    
    var id = GetParam("blogid");
    var clientContext = SP.ClientContext.get_current();
    var oList = clientContext.get_web().get_lists().getByTitle('Team Discussion');     
    var camlQuery = new SP.CamlQuery();
    camlQuery.set_viewXml("<view><query><where><eq><fieldref name="ID" /><value type="Counter">" + id + "</value></eq></where></query></view>");
    //camlQuery.set_viewXml("<view><query><where><eq><fieldref name="Title" /><value type="Text">Mandarin prices</value></eq></where></query></view>");       
    this.collListItem = oList.getItems(camlQuery);     
    clientContext.load(collListItem);      
    clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded), Function.createDelegate(this, this.onQueryFailed));        
    
        
      
}

 


function onQuerySucceeded(sender, args) {
	//alert('Query Success');
    var listItemInfo = '';
    
    var listItemEnumerator = collListItem.getEnumerator();
    var contentbody = "";
                
    while (listItemEnumerator.moveNext()) {
    var oListItem = listItemEnumerator.get_current();
    				      contentbody = oListItem.get_item('Body');         
                               
	}//  end while
     
     
	 
    
     CopyBodyToDescription(contentbody);
     //alert(CopyBodyToDescription);
                                                                      
                               
 		                

} // End Function


function CopyBodyToDescription(contentbody) {
		
		var systemDescriptionRTETextArea = $("textarea[Title='Description']");
		//alert($(systemDescriptionRTETextArea).html());
		$(systemDescriptionRTETextArea).html(contentbody);
		//alert($(systemDescriptionRTETextArea).html());
		
		
}//  End Function


function onQueryFailed(sender, args) {
        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
}
////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////