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<!DOCTYPE html> <html> <body> <p>Click the button to search a string for "blue", and display the position of the match.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var str = "Mr. Blue has a blue house" var n = str.search(/blue/i); document.getElementById("demo").innerHTML = n; } </script> </body> </html>