javascript温习2：String & Math

var txt="Hello World!"

document.write("<p>Big: " + txt.big() + "</p>")
document.write("<p>Small: " + txt.small() + "</p>")

document.write("<p>Bold: " + txt.bold() + "</p>")
document.write("<p>Italic: " + txt.italics() + "</p>")

document.write("<p>Blink: " + txt.blink() + " (does not work in IE)</p>")
document.write("<p>Fixed: " + txt.fixed() + "</p>")
document.write("<p>Strike: " + txt.strike() + "</p>")

document.write("<p>Fontcolor: " + txt.fontcolor("Red") + "</p>")
document.write("<p>Fontsize: " + txt.fontsize(16) + "</p>")

document.write("<p>Lowercase: " + txt.toLowerCase() + "</p>")
document.write("<p>Uppercase: " + txt.toUpperCase() + "</p>")

document.write("<p>Subscript: " + txt.sub() + "</p>")
document.write("<p>Superscript: " + txt.sup() + "</p>")

document.write("<p>Link: " + txt.link("../default.htm") + "</p>")

var str="Visit Microsoft!"
document.write(str.replace(/Microsoft/,"W3School"))

document.write(Math.abs(7.25) + "<br />")
document.write(Math.abs(-7.25))

document.write(Math.round(0.49) + "<br />")
document.write(Math.round(-4.40) + "<br />")

document.write(Math.ceil(5.1) + "<br />")
document.write(Math.floor(5.1) + "<br />")

document.write(Math.min(-3,-5) + "<br />")
document.write(Math.pow(2,3) + "<br />")
document.write(Math.sqrt(0.64) + "<br />")
document.write("PI: " + Math.PI);