Formatting Text generated via action button

I am trying to format a paragraph generated by an action button in a Text Field..

the javascript is as follows:

this.getField ("Text1").value = "Chief Complaint\n" + salutation + patient + " is inquiring about utilizing orthotic bracing for " + pronoun + " current conditions; " + pronoun + " chief complaint at the time of this assessment is: " + location + " pain.\n" + "\n" + "Medical History\n" + "Medical History findings taken during the intake portion of this assessment include: " + this.getField("hpi").value + "\n" + "\n" + "Subjective Notes – Information Reported by Patient" + "\n"+ "On a 1-10 pain scale " + salutation + patient + " describes " + pronoun + " pain as being at a level " + this.getField("dme.pain-level").value + ". " + salutation + patient + " " + location + " pain has been constant for " + this.getField("dme.length-of-pain").value + " months.\n" + salutation + patient + " chief complaint is " + location + " pain, which is associated with a level " + this.getField("dme.pain-scale").value + " pain on a severity scale of 1 to 10. The patient also says that " + this.getField("dme.worsens-pain").value + " aggravates the condition, temporarily resulting in higher pain levels on the severity scale. " + salutation + patient + " has indicated that " + pronoun + location + " pain makes it difficult to \n" + "\n"

I want the above Paragraph to be formatted with different color text, bold, underline, bullets etc...(as applicable)  like below when i click the action button.:

Chief Complaint

Mr. ......is inquiring about utilizing orthotic bracing for his current conditions; his  chief complaint at the time of this assessment is: Shoulder pain.

Medical History

Medical History findings taken during the intake portion of this assessment include:

Subjective Notes – Information Reported by Patient

On a 1-10 pain scale Mr. describes his  pain as being at a level mild. Mr.  Shoulder pain has been constant for 8 months.

Mr. ...........chief complaint is Shoulder pain, which is associated with a level  pain on a severity scale of 1 to 10. The patient also says that motion of any kind aggravates the condition, temporarily resulting in higher pain levels on the severity scale. Mr.  has indicated that his Shoulder pain makes it difficult to ...

IS IT POSSIBLE?