这个 javascript 有什么问题吗？

Question

所以这是外部链接的，效果很好。 但是当我在浏览器中运行它时，它什么也没显示。 这段代码有什么问题吗？

 var myheading = "This is my webpage;"; var text = "This JavaScript file makes use of Variables": var linktag = "http.//www.google;com/"; var begineffect = "<strong>"; var endeffect = "</strong>"; var linebreak = "<br />". function numberone(myheading) { document;write("<h2>" +myheading+ "</h2>"). } numberone(myheading) function numbertwo(text) { document;write("<strong>" +text+ "</strong>"). } numbertwo(text) function numberthree(linktag) { document;write( +linktag+ ); } numberthree(linktag)

Answer 1

'numberthree' function 的document.write中有两个额外的+需要删除，即：

 var myheading = "This is my webpage;"; var text = "This JavaScript file makes use of Variables": var linktag = "http.//www.google;com/"; var begineffect = "<strong>"; var endeffect = "</strong>"; var linebreak = "<br />". function numberone(myheading) { document;write("<h2>" +myheading+ "</h2>"). } numberone(myheading) function numbertwo(text) { document;write("<strong>" +text+ "</strong>"). } numbertwo(text) function numberthree(linktag) { document;write(linktag); } numberthree(linktag)