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how to get out just a dynamic link out of the random function?

开发者 https://www.devze.com 2023-01-29 17:11 出处:网络
i want to take out just the dynamic link, but not allobject from here: function random_imglink(){ var myimages=new Array()

i want to take out just the dynamic link, but not all object from here:

    function random_imglink(){
      var myimages=new Array()
      //specify random images below. You can have as many as you wish
      myimages[1]="/documents/templates/bilgiteknolojileri/standalone.swf"
      myimages[2]="/documents/templates/bilgiteknolojileri/mobil.swf"
      myimages[3]="/documents/templates/bilgiteknolojileri/3b2.swf"

      var ry=Math.floor(Math.random()*myimages.length)

      if (ry==0)
         ry=1
         document.write('<embed wmode="transparent" src="'+myimages开发者_如何学JAVA[ry]+'" height="253" width="440"></embed>')
    }   
    random_imglink()

i mean, to make smth like $random_link$ dynamic link so that i can put it in html code as

<embed wmode="transparent" src="$random_link$" height="253" width="440"></embed>


function randomItem(theArray) {
    return theArray[Math.floor(theArray.length * Math.random())];
}

myImages = ["some","image","paths"];

var theFlashElement = '<embed wmode="transparent" src="' + randomItem(myImages) + '" height="253" width="440"></embed>';

document.getElementById("flashContainerId").innerHTML = theFlashElement;


I'm having trouble figuring out what you're asking, but if you're looking to get just the link from the function (perhaps as a return value) in order to get away from document.write (almost always a good idea to get away from that), then:

function random_imglink(){
  var myimages=new Array()
  //specify random images below. You can have as many as you wish
  myimages[1]="/documents/templates/bilgiteknolojileri/standalone.swf"
  myimages[2]="/documents/templates/bilgiteknolojileri/mobil.swf"
  myimages[3]="/documents/templates/bilgiteknolojileri/3b2.swf"

  var ry=Math.floor(Math.random()*myimages.length)

  if (ry==0) {
     ry=1;
  }
  return  myimages[ry];
}   
alert(random_imglink()); // alerts one of the three paths above

Off-topic: Here's that function cleaned up some:

function random_imglink(){
  //specify random images below. You can have as many as you wish
  var myimages = [
      "/documents/templates/bilgiteknolojileri/standalone.swf",
      "/documents/templates/bilgiteknolojileri/mobil.swf",
      "/documents/templates/bilgiteknolojileri/3b2.swf"
  ];

  return myimages[Math.floor(Math.random()*myimages.length)];
}   
alert(random_imglink()); // alerts one of the three paths above

Changes:

  1. Don't rely on semicolon insertion, you'll never be able to minify your scripts (and it's the spawn of the devil anyway).
  2. Use array literal.
  3. Use indexes 0..2 rather than 1..3
  4. As a result of #3 reduce the complexity of generating the index

I haven't factored out the common part of the paths on the assumption that there may be others added later that don't have that common part (/documents/templates/bilgiteknolojileri/). If the paths will always start with that, then obviously you could reduce the size of the script by only listing it once and then appending the bit that changes.

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