How to input variable inside regex javascript?

How to change color of a text as an input using javascript?

• My assignment Count the number of times a specified letter (an input value) occurs in a sentence (another input).Set the color as defined above in "Color". You must use "document.write" to display the results. Im a beginner, Javascript and i need this ASAP, thks So far i got this code: doesnt work properly <script language="JavaScript"> <!-- function Count(char, sent) { pos = 0; count = -1; i = -1; while (pos != -1) { pos = sent.indexOf(char, i + 1); count++; i = pos; } if (count >= 2) { document.test.occur.value = count; } else { document.test.occur.value = count; } <form name="test"> <p>Enter a character: <input name="char" type="text"><br> Enter the sentence: <input name="sent" type="text"></p> <p><input type="button" value="Click Me" onClick="Count(document.test.char.value, document.abu.sent.value);"> Occurrence: <input name="occur" type="text">

• Answer:

  First of all, javascript must be enclosed between <script> tags. You have only an opening <script> tag. Also, the language attribute is "text/javascript". I don't know exactly what you mean by "change the color" To change the font color, use document.getElementById("object id").style.color = "red"; To change the background color use document.getElementyById('object id').style.backgroundColor = "red"; To add a colored border use document.getElementById("object id").style.border = "1px solid red"; For example, to change the color of the text in an input with an id of "test" to green, type <script type='text/javascript'> document.getElementById("test").color = "green"; </script>